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Outcome data and analysis in pediatric neurosurgery.

OBJECTIVE: The purpose of this study was to analyze the outcomes of five commonly performed pediatric neurosurgical operations: 1) initial shunt insertion; 2) first shunt revision; 3) craniotomy for brain tumor; 4) correction of sagittal synostosis; and 5) release of tethered cords. A second purpose was to analyze the neurological outcome data after tethered cord releases. METHODS: Morbidity and mortality records, patient charts, and operative records were reviewed to determine length of hospitalization and, for each disorder, the pertinent outcomes such as duration of shunt function and incidence of infection or neurological morbidity. RESULTS: Many outcome data were expected, such as a high long-term shunt function rate after primary shunt insertion (65% at 5 yr), a low mortality rate (1%) and permanent morbidity rate (10%) after craniotomy for brain tumor, and a low frequency of transfusion (20%) for sagittal synostosis operations. The outcomes among the three neurosurgeons varied more than expected, e.g., the duration of hospitalization after sagittal reconstructions ranged from 3.1 to 5.8 days; the frequency of infections of primary shunt revisions ranged from 0 to 15%; and the neurological morbidity after tethered cord releases ranged from 0 to 12%, with all neurological morbidity occurring in patients undergoing their second or third tether release. CONCLUSION: The data may serve as a basis for outcome comparisons for these procedures. Outcome data allow us to analyze factors to improve patient care, but outcome analysis is complex.

Adolescent↗

Long-term outcomes for surgically resected craniopharyngiomas.

OBJECTIVE: This retrospective study critically analyzed the long-term functional outcomes and tumor recurrence rates for surgically treated craniopharyngiomas. METHODS: This study used an outcome classification system that included functioning vision, independent versus dependent living, Karnofsky Performance Scale scores, academic levels, work status, and psychological status. Tumor recurrence rates were analyzed with respect to the extent of surgical resection and adjunctive radiotherapy. RESULTS: For 121 patients, with a mean follow-up period of 10 years, the overall "good outcome" rate was 60.3%. Factors associated with poor outcomes included lethargy at presentation, visual deterioration, papilledema, tumor calcification, hydrocephalus, and tumor adhesiveness at surgery. Gross total resection was associated with good outcomes (P = 0.017) and decreased risk of recurrence (P = 0.024). Subtotal resection was associated with increased risk of tumor recurrence (P = 0.0235). The highest risk of recurrence was in the subtotal resection/no radiation group (P = 0.0001). There were no differences in outcomes or recurrence rates between pediatric and adult patients. There were also no differences in outcomes or recurrence rates between papillary and adamantinous tumors. Approximately one-third of patients exhibited morbid obesity, and permanent diabetes insipidus was observed for 25 patients. CONCLUSION: A rigorous evaluation of outcomes for tumors such as craniopharyngiomas must consider not only the extent of resection, as judged by postoperative imaging, but also the long-term physical, intellectual, and psychological functioning of the patients.

Adolescent↗

Spinal epidural abscesses: clinical manifestations, prognostic factors, and outcomes.

OBJECTIVE: This study was performed to evaluate the clinical manifestations and prognostic factors for outcomes among patients with nontuberculous spinal epidural abscesses. METHODS: The records and magnetic resonance imaging/computed tomographic results for patients treated between 1994 and 2000 were retrospectively evaluated. Outcomes were assessed after 11 months, using scores ranging from 0 (dead) to 4 (no neurological deficits). RESULTS: All 25 patients (mean age, 62 yr) underwent surgery and subsequently received antibiotics. Back/neck pain (72% of patients), leukocytosis (64%), fever (60%), and motor deficits (56%) were the most common symptoms at admission. Outcomes were assessed as poor for 40% of the patients and as good (no deficit or independently ambulatory) for 60%. Low leg muscle strength grades (r = 0.68, P < 0.001) and high white blood cell (WBC) counts (r = -0.56, P = 0.006) at admission were significantly correlated with low outcome scores. From the time of admission until 14 days after surgery, the poor-outcome group exhibited significantly (P < 0.005) higher WBC counts, compared with the good-outcome group. The same was true for C-reactive protein levels, with the exception that no differences between groups were observed until 8 days after surgery. Factors such as cervicothoracic abscess locations (P = 0.041), lower limb motor deficits (P = 0.005), complete paralysis (P = 0.005), and WBC counts of more than 14,000 cells/microl (P = 0.049) at admission were observed to be prognostic for poor outcomes. CONCLUSION: Surgical decompression combined with antimicrobial therapy remains the recommended treatment. In addition to abscess locations and motor deficits, inflammatory markers such as WBC counts and C-reactive protein levels are prognostic for outcomes.

Adult↗

Nurse staffing and patient outcomes.

BACKGROUND: Nursing studies have shown that nursing care delivery changes affect staff and organizational outcomes, but the effects on client outcomes have not been studied sufficiently. OBJECTIVE: To describe, at the level of the nursing care unit, the relationships among total hours of nursing care, registered nurse (RN) skill mix, and adverse patient outcomes. METHODS: The adverse outcomes included unit rates of medication errors, patient falls, skin breakdown, patient and family complaints, infections, and deaths. The correlations among staffing variables and outcome variables were determined, and multivariate analyses, controlling for patient acuity, were completed. RESULTS: Units with higher average patient acuity had lower rates of medication errors and patient falls but higher rates of the other adverse outcomes. With average patient acuity on the unit controlled, the proportion of hours of care delivered by RNs was inversely related to the unit rates of medication errors, decubiti, and patient complaints. Total hours of care from all nursing personnel were associated directly with the rates of decubiti, complaints, and mortality. An unexpected finding was that the relationship between RN proportion of care was curvilinear; as the RN proportion increased, rates of adverse outcomes decreased up to 87.5%. Above that level, as RN proportion increased, the adverse outcome rates also increased. CONCLUSIONS: The higher the RN skill mix, the lower the incidence of adverse occurrences on inpatient care units.

Accidental Falls↗

Nursing-sensitive outcomes data collection in acute care and long-term-care settings.

BACKGROUND: Most administrative databases do not contain good information about nursing-sensitive outcomes. OBJECTIVES: To determine (a) the reliability of the instruments measuring nursing-sensitive outcomes, (b) whether the outcome measures are sensitive to changes in patients' health, and (c) whether the outcome measures are associated with nursing interventions. METHODS: The sample consisted of 890 patients from acute care hospitals and long-term-care facilities. A repeated measures design was used. Functional status was assessed on admission and discharge using Minimum Data Set 2.0 items. Symptom (pain, nausea, dyspnea, fatigue) frequency and severity were assessed with 4-point and 11-point numeric scales, respectively. Therapeutic self-care was assessed on discharge from acute care. Nursing interventions were assessed by documentation review. RESULTS: The outcome measures demonstrated very good interrater reliability with weighted Kappa ranging from .64 to .93. The internal consistency reliability was high for functional status and therapeutic self-care. The outcome tools were sensitive to change in patient condition. Select nursing interventions were related to functional status, therapeutic self-care, and symptom outcomes. DISCUSSION: The findings suggest that nurses are able to collect data on nursing-sensitive patient outcomes in a reliable and valid way.

Aged↗

Long-term physical impairment and functional outcomes after complex facial fractures.

To develop an understanding of the expected functional outcomes after facial trauma, a retrospective cohort study of patients with complex facial fractures was conducted. A cohort of adults aged 18 to 55 years who were admitted to the R. Adams Cowley Shock Trauma Center between July of 1986 and July of 1994 for treatment of a Le Fort midface fracture (resulting from blunt force) was retrospectively identified. Outcomes of interest included measures of general health status and psychosocial well being in addition to self-reported somatic symptoms. General health status was ascertained using the Medical Outcomes Study 36-Item Short Form Health Survey (SF-36). The Body Satisfaction Scale was used to define patient concerns about altered body image and shape. To determine whether complex maxillofacial trauma and facial fractures contributed to altered social interactions, the Social Avoidance and Distress scale was used. In addition, information about a patient, his or her injury, and its treatment were ascertained from the medical records. Using the methods described above, 265 patients with Le Fort fractures were identified. These individuals were matched to a similar group of 242 general injury patients. A total of 190 of the Le Fort patients (72 percent of those eligible for the study) and 144 (60 percent) general injury patients were successfully located, and long-term interview data were acquired.Le Fort fracture patients as a group had similar health status outcomes when compared with the group of general injury patients. However, when outcomes were examined by the complexity of the Le Fort fracture, the authors found that study subjects with severe, comminuted Le Fort injuries (group D) had significantly lower SF-36 scores (worse outcomes) for the two dimensions related to role limitations: role limitations due to physical problems and role limitations due to emotional problems (p < 0.05). SF-36 scores for all other dimensions except physical function were also lower for comminuted versus less complex Le Fort fractures, although differences were not statistically significant.Specifically, there was a direct relationship between severity of facial injury and patients reporting work disability. Of group C and D Le Fort patients (severely comminuted fractures) only 55 and 58 percent, respectively, had returned to work at the time of follow-up interview. These figures are significantly lower than the back-to-work percentage of patients with less severe facial injury (70 percent). When study participants were asked if they were experiencing specific somatic symptoms at the time of the interview that they had not experienced before the injury, a significantly larger percent of the Le Fort fracture patients (compared with the general injury patients) responded in the affirmative. Differences between the Le Fort fracture and general injury groups were statistically significant (p < 0.05) for all 11 symptoms. The percentage of patients reporting complaints increased with increasing complexity of facial fracture in the areas of visual problems, alterations in smell, difficulty with mastication, difficulty with breathing, and epiphora, and these differences reached statistical significance. Patients sustaining comminuted Le Fort facial fractures report poorer health outcomes than patients with less severe facial injury and substantially worse outcomes than population norms. It is also this severely injured population that reports the greatest percentage of injury-related disability, preventing employment at long-term follow-up. The long-term goal of centralized tertiary trauma treatment centers must be to return the patient to a productive, active lifestyle.

Activities of Daily Living↗

Back pain in primary care. Outcomes at 1 year.

Outcomes of primary care back pain patients (N = 1128) were studied at 1 year after seeking care. Changes in depression depending on outcome, and predictors of poor outcome were evaluated. Less than one back pain patient in five reported recent onset (first onset within the previous 6 months). One year after seeking care, the large majority of both recent and nonrecent-onset patients reported having back pain in the previous month (69% vs. 82%). A significant minority of both recent and nonrecent-onset patients had either a poor functional outcome (14% vs. 21%) or continuing high intensity pain without appreciable disability (10% vs. 16%). Predictors of poor outcome included pain-related disability, days in pain, lower educational attainment, and female gender. Among initially dysfunctional patients with persistent pain, one half were improved and one third had a good outcome at the 1-year follow-up. Among initially dysfunctional patients who experienced a good outcome, elevated depressive symptoms improved to normal levels at follow-up. The outcome of back pain was predicted by pain-related disability and days in pain rather than by recency of onset, so it may be more meaningful to distinguish characteristic levels of pain intensity, pain-related disability, and pain persistence than to classify patients as acute or chronic.

Adult↗

Health outcome assessment before and after adult deformity surgery. A prospective study.

STUDY DESIGN: Fifty-five patients undergoing surgery for adult spinal deformity assessed their health status using a generic health outcome instrument before surgery and at an average of 2 years after surgery. OBJECTIVE: To assess whether adult spinal deformity surgery is a useful intervention when patients evaluate their own perception of health. The Medical Outcomes Survey Short Form-36, a validated generic health outcome assessment form, was used to measure patient's health status. SUMMARY OF BACKGROUND DATA: Surgery for adult scoliosis is technically demanding. No study that we are aware of uses a generic health outcome instrument in a prospective manner to compare patients' perception of their health after adult scoliosis surgery. The Medical Outcomes Survey Short Form-36 has been validated in multiple studies assessing other medical conditions and was found to be reliable, comprehensive, brief, and generic. METHODS: Sixty-eight adult patients undergoing surgery for adult spinal deformity were prospectively enrolled. Fifty-five patients were available to complete the Medical Outcomes Surgery Short Form-36 after surgery. The scores of the health profile were compared before and after surgery. The results of patients younger than 40 years were compared with those of patients older than 40 years. The results of patients younger than 40 years were compared with those of patients older than 40 years. The results of patients fused to more caudal end vertebral levels ((L4, L5)5) were compared with those who were fused to more cranial end vertebral levels. The results of patients without complications after surgery were compared with those of patients with complications after surgery. RESULTS: Average follow-up period was 22.5 months (minimum 12 months) in 82% of 68 patients. Statistically significant improvements were seen in postoperative scores for physical function, social function, bodily pain, and perceived health change. We found no significant differences in self-reported health function parameters related to age ( > 40 vs. < 40), end vertebral level of fusion, or presence of complications after surgery. CONCLUSIONS: Applying a generic health outcome instrument to adult spinal deformity surgery shows that adult scoliosis surgery significantly improves patient self-reported health assessment and function. Beneficial results do not appear to deteriorate with age or more caudal end vertebral levels of fusion. Future studies combining disease-specific outcomes analysis and generic health surveys to assess end results of adult spinal deformity surgery will be useful.

Adult↗

The Maine Lumbar Spine Study, Part III. 1-year outcomes of surgical and nonsurgical management of lumbar spinal stenosis.

STUDY DESIGN: A prospective cohort study of patients with lumbar spinal stenosis recruited from the practices of orthopedic surgeons and neurosurgeons throughout Maine. OBJECTIVE: To assess 1-year outcomes of patients with lumbar spinal stenosis treated surgically or nonsurgically. SUMMARY OF BACKGROUND DATA: No randomized trials and few nonexperimental studies have compared surgical and nonsurgical treatment of patients with lumbar spinal stenosis. The authors' goal was to assess 1-year outcomes of patients with lumbar spinal stenosis treated surgically or nonsurgically. METHODS: Eligible, consenting patients participated in baseline interviews and were then mailed follow-up questionnaires at 3, 6, and 12 months. Clinical data were obtained from a physician questionnaire. Outcomes included patient-reported symptoms of leg and back pain, functional status, disability, and satisfaction with care. RESULTS: One hundred forty-eight patients with lumbar spinal stenosis were enrolled, of whom 81 were treated surgically and 67 treated nonsurgically. On average, patients in the surgical group had more severe imaging findings and symptoms and worse functional status than patients in the nonsurgical group at entry. Few patients with mild symptoms were treated surgically, and few patients with severe symptoms were treated nonsurgically. However, of the patients with moderate symptoms, a similar percent were treated surgically or nonsurgically. One year after study entry, 28% of nonsurgically and 55% of surgically treated patients reported definite improvement in their predominant symptoms (P = 0.003). For patients with moderate symptoms, outcomes for surgically treated patients were also improved compared with those of nonsurgically treated patients. Surgical treatment remained a significant determinant of 1-year outcome, even after adjustment for differences between treatment groups at entry (P = 0.05). The maximal benefit of surgery was observed by the time of the first follow-up evaluation, which was at 3 months. Although few nonsurgically treated patients experienced a worsening of their condition, there was little improvement in symptoms and functional status compared with study entry. CONCLUSIONS: At a 1-year evaluation of patient-reported outcomes, patients with severe lumbar spinal stenosis who were treated surgically had greater improvement than patients treated nonsurgically. Comparisons of outcomes by treatment received must be made cautiously because of differences in baseline characteristics. A determination of whether the outcomes observed persist requires long-term follow-up.

Adult↗

Associations between spinal deformity and outcomes after decompression for spinal stenosis.

STUDY DESIGN: Prospective observational study. OBJECTIVES: To examine associations between radiographic parameters (scoliosis and olisthesis) and outcomes of surgery for degenerative spinal stenosis. SUMMARY OF BACKGROUND DATA: Preoperative degenerative scoliosis generally is thought to be associated with an unfavorable outcome of surgery for spinal stenosis. Data on the relationship between an increase in olisthesis after laminectomy for spinal stenosis and outcomes of surgery are sparse and conflicting. METHODS: Radiographs were obtained before surgery and at least 6 months after surgery and coded for preoperative scoliosis and change in olisthesis after surgery. The reviewers of radiographs were blind to outcome information. Patients completed questionnaires on demographic and clinical data as well as on back pain, lower extremity pain, walking capacity, and satisfaction with surgery. Associations between radiographic data and patient reported outcomes were examined with the Spearman rank correlation and confirmed with multiple linear regression models that adjusted for potential confounders. RESULTS: Ninety patients met eligibility criteria. Preoperative scoliosis was associated with less improvement in back pain at 6 months and at 24 months after surgery. An increase in olisthesis after surgery was associated with greater improvement in lower extremity pain at 6 months and at 24 months after surgery. An increase in olisthesis also was associated with greater improvement in walking capacity at 6 months and at 24 months after surgery. In multivariable analyses that adjusted for potential confounders, a change in olisthesis was not associated significantly with greater improvement in any of the outcomes. CONCLUSION: The data support the widely held view that preoperative scoliosis is associated with an unfavorable outcome after decompression for degenerative lumbar spinal stenosis. Increase in olisthesis was not associated with unfavorable results. In fact, there was a weak trend toward better outcomes with greater slip. These data indicate that minor increases in olisthesis after surgery for spinal stenosis generally are tolerated well.

Aged↗

Patient outcomes after decompression and instrumented posterior spinal fusion for degenerative spondylolisthesis.

STUDY DESIGN: A retrospective study of patient outcomes after decompression and fusion for degenerative spondylolisthesis, using the SF-36 survey and a functional questionnaire. SUMMARY OF BACKGROUND DATA: In recent studies, patient outcomes have been examined more specifically; however, detailed functional outcomes are not available nor have widely used outcomes instruments been administered. METHODS: Thirty patients aged more than 40 years (average, 60.1 years) who had degenerative spondylolisthesis were evaluated after decompression and instrumented posterior fusion. Charts and radiographs were also reviewed. Questionnaires were administered by telephone, and consisted of the Medical Outcomes Study short form (SF-36) and 27 questions designed to evaluate function, quality of life, medication usage, and satisfaction with surgical results. RESULTS: Ninety-three percent of patient's were satisfied with their outcomes. Patients improved significantly in their ability to perform heavy and light activities, participate in social activities, sit, and sleep (P < 0.001) and also improved in pain, depression, and medication usage (P < 0.0001). SF-36 data showed significantly better overall assessment of health in all categories than that in a published cohort of patients with low back pain. The current study group also showed no difference in seven of eight categories when compared with the general population. Fusion rate was 93% at an average of 128 days. Three patients required reoperation: two for pseudarthrosis and one for a deep infection. A poorer outcome, scored by the SF-36, was associated with greater preoperative stenosis (P < 0.05) or occurrence of a complication (P < 0.05). CONCLUSIONS: Patients treated with decompression and fusion for degenerative spondylolisthesis had improved functional outcomes, when measured by a disease-specific questionnaire and by widely used instruments.

Activities of Daily Living↗

Variability of outcome after lumbar disc surgery.

STUDY DESIGN: A prospective, consecutive study of patients' outcome at three subsequent follow-up times after lumbar disc surgery. OBJECTIVES: To evaluate how consistent outcome remained in a group of patients after lumbar disc surgery. SUMMARY OF BACKGROUND DATA: Despite similar results concerning the overall outcome, results in most studies show different prognostic factors for lumbar disc surgery at different follow-up times. A reason for this observation could be that patients shift to a different outcome group during the observation period. METHODS: Before surgery and at the three follow-ups (3, 12, and 28 months after surgery) the Low Back Outcome Score was calculated. Groups with favorable and unfavorable outcome were determined after each follow-up according to the scores. RESULTS: Ninety-eight patients were studied. Forty percent showed an unstable outcome at different follow-up times. For each follow-up, three prognostic factors were determined. No prognostic factor showed significance at all follow-up examinations. CONCLUSIONS: Patients whose outcome after lumbar disc surgery does not remain stable present a major problem in the calculation of prognostic factors.

Adolescent↗

A prospective study of psychological predictors of lumbar surgery outcome.

STUDY DESIGN: Prospective design in which 102 patients were evaluated with a battery of psychological assessment tests 1-2 weeks before surgery, and outcome was assessed 6 months and 1 year after surgery. OBJECTIVES: The study examined whether three aspects of psychological distress (depression, anxiety, and hostility) predict several surgical outcomes (employment status, subjective pain change ratings, and changes in functional abilities). SUMMARY OF BACKGROUND DATA: Surgery for back pain has been shown to yield poor results in 15-45% of patients. Tools are needed to identify those "at risk" for poor outcome. Aspects of emotional distress, including anxiety, depression, and hostility, have been found to be relevant to various illness outcomes (e.g., cancer, heart disease), but their influence has not been prospectively evaluated for back pain surgical outcome. METHODS: Study patients completed measures of distress before surgery, including the Spielberger Trait Anxiety Inventory, Zung Depression Scale, Modified Somatic Perception Questionnaire, and Cook-Medley Hostility Scale. At 1-year follow-up, patients completed pain change ratings, functional abilities measure (Dallas Pain Questionnaire), and questions about employment status. RESULTS: Multivariate regression analyses, controlling for significant demographic variables, found that failure to return to work was predicted by presurgical anxiety (P < 0.001) and depression (P < 0. 01); failure to report improvement in pain was predicted by presurgical somatic anxiety (P < 0.01) and depression (P < 0.058); and failure to report improved functional abilities was predicted by presurgical somatic anxiety (P < 0.01) and depression (P < 0.05). Hostility did not predict any outcome. Regression analyses found a strong predictor to be a combination of the Zung Depression Scale and Modified Somatic Perception Questionnaire, known as the Distress and Risk Assessment Method (DRAM). CONCLUSIONS: These results indicate that screening for presurgical distress is likely to identify those patients at risk for poor outcome. Studies to evaluate whether presurgical psychological treatment improves outcome are warranted.

Adolescent↗

Outcomes of posterolateral lumbar fusion in Utah patients receiving workers' compensation: a retrospective cohort study.

STUDY DESIGN: A retrospective cohort study consisting of a medical record review and a follow-up telephone survey of patients with lumbar fusion, at least 2 years after their surgery, was performed. OBJECTIVE: To identify presurgical correlates and long-term outcomes from posterolateral lumbar fusion in Utah patients receiving workers' compensation. SUMMARY OF BACKGROUND DATA: Lumbar fusion has been criticized for its highly variable outcomes, and compensated workers are at particular risk for poor outcomes. Evidence suggests that presurgical psychosocial factors may be important modifiers of back pain reporting and back surgery outcomes. METHODS: The patients in this study were 185 compensated workers in Utah who underwent posterolateral lumbar fusion. Patient medical records were independently reviewed, and medical and sociodemographic variables were coded. A telephone outcome survey was completed with 130 patients (70%) an average of 4.6 years after their surgery. RESULTS: Reported solid fusion, reoperation, and disability rates for the follow-up sample were 74%, 24%, and 25%, respectively. As reported by the patients, 41% experienced no change or a worsened quality of life. Mean scores from the Roland and Morris Back Pain Disability Questionnaire, the Stauffer-Coventry-Index, and the Short-Form 20 Multidimensional Health Survey indicate that many patients experienced postsurgical dysfunction. Presurgical predictors of outcomes were number of prior low back operations, income at time of injury, age, litigation, and depression. CONCLUSIONS: Outcomes of posterolateral lumbar fusion among compensated workers in Utah are inconsistent. Outcomes can be predicted by presurgical sociodemographic variables. Screening for such presurgical risk factors may be important for prudent surgical decisions and rehabilitation planning.

Adult↗

The evaluation of the surgical management of nerve root compression in patients with low back pain: Part 1: the assessment of outcome.

STUDY DESIGN: This was a prospective study investigating the outcome of decompression surgery using validated measures of outcome. OBJECTIVES: To investigate the outcome of lumbar decompressive surgery in the initial postoperative year period in terms of function, disability, general health, and psychological well-being. SUMMARY OF BACKGROUND DATA: The majority of studies investigating the outcome of lumbar decompression surgery have been retrospective and have not used validated measures of outcome. This limits their interpretation and usefulness. METHODS: Eighty-four patients undergoing lumbar spinal stenosis surgery were recruited into this study. Patients were assessed by use of validated measures of outcome including the Oswestry Disability Index and the Short Form SF-36 General Health Questionnaire before surgery and 6 weeks, 6 months, and 1 year after surgery. RESULTS: A significant reduction in pain (P < 0.001) was observed at the 6-week postoperative stage; this did not change at the subsequent assessment stages. Only some of the SF-36 categories were sensitive to change. The subcategories that were sensitive to change were physical function (P < 0.05), bodily pain (P < 0.001), and social function (P < 0.05). Improvements were observed in these categories at the 6-week and 6-month reviews. A gradual reduction in the Oswestry Disability Index was observed with time, with changes principally being observed between the 6-week and 6-month review and the 6-week and 1-year review stages (P < 0.05). Minimal changes were observed in the psychological assessments with time. The outcome of surgery could not be predicted reliably from psychological, functional, or pain measures. CONCLUSIONS: The visual analogue pain scales, the Oswestry Disability Index, and certain categories of the SF-36 Questionnaire, namely bodily pain and physical and social function, appeared to be the most sensitive outcome measures, with significant improvements occurring at the 6-week and 6-month reviews.

Decompression, Surgical↗

Functional and economic outcome following microdiscectomy for lumbar disc herniation in 672 patients.

A retrospective assessment of 809 patients operated on in 1990-1998 was performed. A patient-based outcome questionnaire also was incorporated into the study. The outcome was graded according to the Functional Economic Rating scale. A total of 64% of the patients were relieved of their complaints 3.2-10.2 years (median 6.3 years) after lumbar disc surgery. An excellent outcome, defined as Prolo scale of 9 or 10, was achieved in 55.8%, a good outcome (Prolo scale 7 or 8) in 20.7%, a fair outcome (Prolo scale 5 or 6) in 11.4%, and a poor outcome (Prolo scale of </=4) in 12.1% of the patients. Patients with strenuous occupations had a significantly (P = 0.004) less favorable outcome than patients with less strenuous or sedentary occupations. Criteria for evaluating the results of treating lumbar spinal disorders vary widely. A more universal acceptance of common criteria for judging the outcome of spinal operations should facilitate comparisons among various methods of treatment.

Adolescent↗

Obstetric and newborn outcomes in a cohort of HIV-infected pregnant women: a report of the women and infants transmission study.

OBJECTIVE: To determine obstetric and neonatal outcomes in a cohort of HIV-infected pregnant women and to assess whether HIV-related immunosuppression increases the risk of adverse outcomes of pregnancy. METHODS: Between 1989 and 1994, interview, physical examination, laboratory, and medical record data were prospectively collected from HIV-infected pregnant women and on their newborns. Factors associated with adverse pregnancy outcome and HIV disease status were correlated with pregnancy outcome using logistic regression analysis. RESULTS: 634 women delivered after 24 weeks of gestation. Preterm birth, low birth weight, and small-for-gestational-age neonates occurred in 20.5%, 18.9%, and 24.0% of pregnancies, respectively. Factors associated with low birth weight were CD4 percentage <14%, history of adverse pregnancy outcome, pediatric HIV infection, bleeding during pregnancy, and Trichomonas infection. Preterm birth was associated with CD4 percentage <14%, a history of adverse pregnancy outcome, and bleeding during pregnancy. Being small for gestational age was associated with maternal hard drug use during pregnancy, Trichomonas infection, history of adverse pregnancy outcome, and hypertension. CONCLUSIONS: Adverse pregnancy outcomes are common for HIV-infected women and are associated with low maternal CD4 percentage and pediatric HIV infection. Preterm birth, low birth weight, and small-for-gestational-age ranking, however, are also associated with previously recognized sociodemographic and obstetric factors that are not unique to HIV infection.

Adult↗

Incorporating outcomes research into clinical practice: the four-step approach.

Outcomes research is designed to develop new and generalizable knowledge about care delivery, interventions, and patient outcomes. Advanced practice nurses are asked not only to participate in outcomes research but also to develop and maintain outcomes research projects and databases and to demonstrate the effectiveness of their own care practices through outcomes research. A four-step approach is described as an easy way in which to help advanced practice nurses engage in outcomes research at any site and with any patient population. The four steps are: Step I: identify and describe current practice in nursing-medical care and its outcome(s); Step II: data collection; Step III: data analysis; and Step IV: praxis: putting the research into practice. Participating in outcomes research will allow advanced practice nurses to improve healthcare services and to secure the role of advanced practice nurses in the changing healthcare arena.

Aged↗