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PubMed1986

Electroconvulsive shock therapy and maximum binding of platelet tritiated imipramine binding in depression.

We studied the tritiated imipramine binding values in platelets from 12 hospitalized untreated patients with endogenous depression and found a significant decrease in maximum binding (Bmax) values compared with a control population of the same age and sex. There were no changes in the equilibrium dissociation affinity constant values between the untreated depressives and the control population. After at least six sessions of electroconvulsive therapy and at the time when a significant clinical improvement of depression was confirmed, the Bmax value of tritiated imipramine binding in platelets was slightly increased but was still significantly below that of the control values. However, when six of these patients were reexamined after 12 to 18 months, at a time when they were euthymic, the Bmax of tritiated imipramine binding in platelets was found in the same range as the values of the control population. Our results indicate that clinical improvement precedes the changes in Bmax of tritiated imipramine binding in platelets from depressed patients. The tritiated imipramine binding in platelets is a useful biologic marker in affective disorders. Furthermore, our results suggest that tritiated imipramine binding in platelets may be a state-dependent biologic marker in depression.

Aged↗
PubMed2006

Mortality in siblings of patients coinfected with HIV and hepatitis C virus.

BACKGROUND: Coinfection with hepatitis C virus (HCV) is a poor prognostic factor for human immunodeficiency virus (HIV)-infected patients. We examined whether the increased mortality in these patients is partly explained by a familial excess risk of death. METHODS: Danish HIV-infected patients who had had at least 1 HCV test were included (n=3531). In addition, 336,652 population control subjects matched for sex, age, and residency were identified from the Danish Civil Registration System. For both HIV-infected patients and population control subjects, we identified all siblings born after 1951, with dates of death or emigration. Siblings of HIV-infected patients were classified according to the patients' HCV serostatus. Survival after age 20 years was compared among the groups of siblings. RESULTS: We identified 437 siblings of HIV/HCV-coinfected patients, 1856 siblings of HIV-monoinfected patients, and 285,509 siblings of population control subjects. Mortality was substantially higher in siblings of HIV/HCV-coinfected patients than in either siblings of HIV-monoinfected patients (mortality rate ratio [MRR], 2.97 [95% confidence interval {CI}, 1.98-4.45]) or siblings of control subjects (MRR, 4.23 [95% CI, 3.09-5.79]). Siblings of HIV-monoinfected patients had slightly higher mortality (MRR, 1.43 [95% CI, 1.10-1.85]) than siblings of control subjects. CONCLUSIONS: HCV infection is a marker of familial factors that affect the survival of HIV-infected patients independently of the pathogenicity of HCV.

Adult↗
PubMed2026

plinkQC: an integrated tool for ancestry inference, sample selection, and quality control in population genetics.

MOTIVATION: Population genetic analyses rely on high quality datasets that pass rigorous controls for sample and marker quality. Many analyses also require additional processing including identification of ancestry and sample relatedness. A software package that addresses all these common, yet crucial tasks is missing. RESULTS: We have developed plinkQC, an R/CRAN package that combines these functionalities into a single software package with detailed vignettes for example applications. plinkQC determines the ancestry of study samples via a pre-trained random forest classifier that reaches 98% performance accuracy with just 5% of marker overlap between reference and user data. To obtain the maximal set of unrelated study samples, we developed a graph-based pruning method, taking both relationship estimates and sample quality into account. We demonstrate optimal sample selection on the 1000 Genomes project, where we retain an additional 71 samples compared to publicly available exclusion lists. Finally, plinkQC bundles these results together with per-individual and per-marker quality control checks into three simple functions and returns both the quality controlled dataset and quality control report about each step of the analysis. AVAILABILITY AND IMPLEMENTATION: plinkQC is available as an R/CRAN package. The documentation and code are available on github: https://meyer-lab-cshl.github.io/plinkQC/ and https://github.com/meyer-lab-cshl/plinkQC_manuscript.

Software↗
PubMed2006

High prevalence of major cardiovascular risk factors in first-degree relatives of individuals with familial premature coronary artery disease--the GENECARD project.

BACKGROUND: Hypertension, hypercholesterolemia, obesity and smoking are highly prevalent among patients with familial premature coronary artery disease (FP-CAD). Whether these risk factors equally affect other family members remains unknown. METHODS: We examined 222 FP-CAD patients, 158 unaffected sibs, 197 offspring and 94 spouses in 108 FP-CAD families (> or = 2 sibs having survived CAD diagnosed before age 51 (M)/56 (F)), and compared them to population controls. RESULTS: Unaffected sibs had a higher prevalence of hypertension (49% versus 24%, p<0.001), hypercholesterolemia (47% versus 34%, p=0.002), abdominal obesity (35% versus 24%, p=0.006) and smoking (39% versus 24%, p=0.001) than population controls. Offspring had a higher prevalence of hypertension (females), hypercholesterolemia and abdominal obesity than population controls. No difference was observed between spouses and controls. Compared to unaffected sibs, FP-CAD affected sibs had a similar risk factor profile, except for smoking, which was more prevalent (76% versus 39%, p=0.008). CONCLUSIONS: Hypertension, obesity and hypercholesterolemia are highly prevalent among first-degree relatives, but not spouses, of patients with FP-CAD. These persons deserve special medical attention due to their familial/genetic susceptibility to atherogenic metabolic abnormalities. In these families, smoking may be the trigger for FP-CAD.

Abdominal Fat↗
PubMed2006

Excellent long-term survival in patients with primary biliary cirrhosis and biochemical response to ursodeoxycholic Acid.

BACKGROUND & AIMS: Because the efficacy of UDCA on long-term outcome of primary biliary cirrhosis (PBC) has not been completely elucidated, we have assessed the course and survival of patients with PBC treated with UDCA and compared with the survival predicted by the Mayo model and the estimated survival of a standardized population. METHODS: (One hundred ninety-two patients [181 women] with PBC treated with UDCA [15 mg/kg per day] for 1.5-14 years.) Response to treatment was defined by an alkaline phosphatase decrease greater than 40% of baseline values or normal levels after 1 year of treatment. The predicted survival was obtained by the Mayo model and the estimated survival was taken from the standardized matched Spanish population. RESULTS: Seventeen patients died or fulfilled criteria for liver transplantation (8.9%). The observed survival was higher than that predicted by the Mayo model and lower than that of the control population (P < .001). One hundred seventeen patients (61%) responded to treatment. The survival of responders was significantly higher than that predicted by the Mayo model and similar to that estimated for the control population (P = .15). By contrast, the survival of patients without biochemical response was lower than that estimated for the Spanish population (P < .001) although higher than that predicted by the Mayo model. CONCLUSIONS: Biochemical response to UDCA after 1 year is associated with a similar survival to the matched control population, clearly supporting the favorable effects of this treatment in PBC. The suboptimal survival of nonresponders identifies the group for further treatments.

Alkaline Phosphatase↗
PubMed1996

Use of insulin-like growth factor-I (IGF-I) and IGF-binding protein-3 in the diagnosis of acromegaly and growth hormone deficiency in adults.

The goal of our study was to compare the clinical usefulness of plasma insulin-like growth factor-I (IGF-I) (with and without binding protein extraction) and IGF binding protein-3 (IGFBP-3) measurements in the diagnosis of growth hormone (GH) disorders in adults. IGF-I and IGFBP-3 concentrations were measured in 25 acromegalic and 25 GH-deficient adult (GHDA) subjects (20-76 years) by comparison to a control population (n = 81) after age and sex stratification. In untreated acromegaly, IGF-I and IGFBP-3 were clearly increased (10 times the mean of controls for unextracted IGF-I, 4 times for extracted IGF-I and 2 times for IGFBP-3). Using the mean + 2SD of the control population as the cut-off point, the sensitivity of IGF-I for the diagnosis of acromegaly was higher than that of IGFBP-3 (unextracted IGF-I: 96% and extracted IGF-I: 100% vs IGFBP-3: 76%). In GHDAs, IGF-I and IGFBP-3 were decreased (34% of the mean of controls for unextracted IGF-I, 37% for extracted IGF-I and 70% for IGFBP-3). Using the mean - 2SD of the control population as the cut-off point, the sensitivity of IGF-I measurement for the diagnosis of GHDA was relatively low, but better for unextracted (68%) than for extracted IGF-I (52%). The sensitivity of IGFBP-3 was much lower (36%), thus invalidating this parameter for the diagnosis of GHDA. Our observations demonstrate that IGF-I measurement is a more powerful tool than IGFBP-3 measurement for the diagnosis of GH disorders in adults. Both IGF-I and IGFBP-3 are very useful for the diagnosis of acromegaly, but they are less reliable for diagnosing GHDA, as normal IGF-I or IGFBP-3 values do not rule out GH deficiency.

Acromegaly↗
PubMed1996

A voxel-by-voxel multivariate analysis of cerebral perfusion defects in divers with 'bends'.

Past analysis of dysbaric-induced cerebral perfusion defects, demonstrated by 99Tcm-hexamethylpropylene amine oxime (99Tcm-HMPAO) single photon emission tomography in divers using quantitative and/or univariate techniques, has resulted i considerable controversy regarding the significance of these lesions compared to those seen in control subjects, correlations with clinical findings and the role of 99Tcm-HMPAO as a prognostic indicator in decompression sickness. We tried to address these problems by using a multivariate approach to a voxel-by-voxel analysis, involving the use of principal components, to determine ranges of normality in 50 reference controls. In subsequent images, abnormality was defined as 10 spatially connected voxels at an appropriate significance level of three standard deviations. The images of 50 divers with clinically diagnosed 'bends' were compared with those of a further 40 normal population controls with no previous history of loss of consciousness, head injury or dysbarism. The results showed that 19 of 50 divers with 'bends' and 3 of 40 population controls had significant perfusion defects, representing a significant difference between divers with dysbarism and population controls at the level P < 0.002. It is concluded that dysbarism causes significant cerebral cortical perfusion defects in affected divers both in 'silent' and symptomatic (clinically correlated) areas.

Adolescent↗
PubMed2005

Investigation of familial segregation of hyperreactive malarial splenomegaly in Kumasi, Ghana.

Hyperreactive malarial splenomegaly (HMS), a common cause of massive splenomegaly in malaria-endemic regions, is defined as persistent splenomegaly without demonstrable underlying disease. Previous studies have found HMS more frequently in certain tribes in Papua New Guinea, Uganda and Nigeria, with strong familial associations in Uganda and Papua New Guinea. This case-control study aimed to determine the extent of familial association of splenomegaly and the pattern of segregation of the condition in families in Ghana. It involved 22 HMS cases with 99 relatives, and 15 population controls of similar socio-economic background with 51 relatives. The pedigree of each family was recorded. Clinical and laboratory data were collected on all participants, including the presence and degree of splenomegaly. Relatives with splenomegaly were identified for 27% of HMS cases and for 6.7% of population controls (P=0.04). There were significant differences in the IgM levels, which were higher (P=0.005), and the haemoglobin levels, which were lower (P=0.009), in cases compared with controls. In Ghana, relatives of HMS cases are more likely to have splenomegaly than population controls, but with no obvious pattern of Mendelian segregation. HMS aetiology in Ghana is likely to be complex, involving multiple genetic and environmental factors.

Adult↗
PubMed2003

Distribution of human papillomavirus types 16 and 18 variants in squamous cell carcinomas and adenocarcinomas of the cervix.

The distributions of human papillomavirus (HPV) types detected in cervical adenocarcinomas and squamous cell tumors differ. However, whether the distributions of intratypic HPV variants seen in these two histological forms of cervical disease differ is unknown. Our objective was to compare the distribution of HPV intratypic variants observed in squamous cell carcinomas (SCC) and cervical tumors of glandular origin (e.g., adenocarcinomas; AC) for two HPV types commonly observed in cervical tumors, HPV16 and HPV18. Participants in a multicenter case-control study of AC and SCC conducted in the eastern United States were studied. A total of 85 HPV16 and/or HPV18 positive individuals (31 diagnosed with AC, 43 diagnosed with SCC, and 11 population controls) were included. For HPV16-positive individuals, both the noncoding long control region and the E6 open reading frame were sequenced, and classified into phylogenetic-based lineage groups (European, Asian-American, African1, and African2). For HPV18-positive individuals, the long control region region only was sequenced and classified into known intratypic lineages (European, Asian-Amerindian, and African). The distribution of these different intratypic lineages among AC cases, SCC cases, and population controls was compared using standard methods. Non-European HPV16 and/or HPV18 intratypic variants were observed in 42% of ACs compared with 16% of SCCs and 18% of population controls (P = 0.04). Intratypic variants from the Asian-American lineage of HPV16 accounted for the differences seen between histological groups. The differences observed between AC and SCC cases were strongest for HPV16, and persisted in analysis restricted to Caucasian women, suggesting that the effect cannot be explained by differences in the ethnic make-up of AC versus SCC cases. Cervical AC and SCC differ not only with respect to the distribution of HPV types detected but also with respect to intratypic variants observed. Non-European HPV16 and/or HPV18 variants are commonly seen in AC. A possible hormonal mechanism is suggested to explain the observed findings.

Adenocarcinoma↗
PubMed1978

Total serum IgE levels in normals and patients with chronic non-specific lung diseases.

Total serum IgE was measured, using a sensitive sandwich method, in a healthy control population, in healthy persons with a familial history of chronic non-specific lung disease and in patients with chronic non-specific lung disease (CNSLD). In the control population a median total serum IgE of 39 I.U./ml was found. Total serum IgE levels were significantly lower in women that in men. Healthy persons with a familial history of CNSLD had significantly increased total IgE levels compared with the control population. The IgE level was even higher in the group of patients with CNSLD. The presence of specific IgE antibodies and/or an early onset of the symptoms of CNSLD was accompanied by higher total serum IgE levels compared with the IgE values in the other CNSLD patients. But the total IgE levels were increased in all subgroups of CNSLD patients. A significant decrease of the IgE level with age was observed in CNSLD patients.

Adolescent↗
PubMed1996

Evidence for selective health maintenance organization enrollment among children and adolescents covered by Medicaid.

OBJECTIVE: To determine whether children and adolescents are selectively enrolled in health maintenance organizations (HMOs) based on age, gender, diagnosis, or prior utilization. DESIGN: Case-control study. New HMO enrollees were compared with a control population of non-HMO enrollees. SETTING: Medicaid claims data and HMO participation records for the Medicaid and Aid to Families of Dependent Children sector in Baltimore, Md. RESULTS: Controlling for age, significant differences in prior health care utilization as measured by Medicaid expenditures and hospital days were noted. Children enrolling in HMOs had significantly lower prior utilization than children from the control population as measured by dollar expenditures and hospital days. Young children enrolling in HMOs were only half as likely to have prior claims for asthma. Conversely, adolescents enrolling in HMOs had significantly higher prior utilization than adolescents from the control population. The difference among adolescents was due to a higher birth rate among new HMO enrollees in that age bracket. CONCLUSIONS: Voluntary HMO enrollment of children covered by Medicaid and Aid to Families of Dependent Children sector was subject to selection biases that may be economically favorable to the HMOs and may undermine the cost-containment goals of prepaid health care for Medicaid participants. Voluntary capitated systems where fee-for-service remains a significant alternative must monitor for these selection biases that are not allowed for in the adjustments to capitation rates.

Adolescent↗
PubMed1994

Dysfunctional labor after external cephalic version.

OBJECTIVE: To determine whether there is a greater occurrence of dysfunctional labor or a higher incidence of cesarean delivery for failure to progress in women who have undergone a successful version for breech presentation. METHODS: Using a retrospective case-control design, 76 women who had undergone a successful version from January 1988 through July 1993 were identified and their medical records reviewed. The control population was matched for delivery date, parity, and gestational age. RESULTS: There was no difference in the cesarean delivery rates for failure to progress between women undergoing successful version (6%) and the control population (6%). The incidence of dysfunctional labor between the groups did not differ significantly. Dysfunctional labor requiring oxytocin augmentation occurred in 29.6% of women who had undergone a version and in 24.2% of the control population (P = .6530). CONCLUSION: There is no significant increase in the cesarean delivery rate in women undergoing a version for breech presentation.

Case-Control Studies↗
PubMed2000

Bone mineral density in patients with recently diagnosed inflammatory bowel disease.

BACKGROUND & AIMS: A high prevalence of osteoporosis is reported in inflammatory bowel disease (IBD), and its pathogenesis is not completely resolved. We investigated whether bone mineral density (BMD) in patients with IBD at diagnosis is lower than in population controls, and whether BMD differs between patients with Crohn's disease and those with ulcerative colitis. METHODS: In 68 patients and 68 age- and gender-matched population controls, BMD of total body, spine, and hip was assessed using dual-energy x-ray absorptiometry within 6 months after establishing the diagnosis. Determinants for low BMD were assessed. RESULTS: There were no significant differences in BMD (g/cm(2)) between patients and controls, and no significant differences in BMD between patients with either Crohn's disease or ulcerative colitis. Multivariate regression analysis showed that duration of complaints longer than 6 months before diagnosis (P = 0.041), age (P = 0.019), and body mass index less than 20 kg/m(2) (P = 0.006) significantly correlated with low BMD. CONCLUSIONS: BMD in patients with recently diagnosed IBD was not significantly decreased compared with population controls. Subsequent development of osteoporosis in patients with IBD seems to be a phenomenon related to the disease process and/or the treatment modalities of IBD.

Absorptiometry, Photon↗
PubMed2004

Multilocus haplotype analyses reveal association between 5 novel IL-15 polymorphisms and asthma.

BACKGROUND: IL-15 is a T(H)1-related cytokine that is involved in the inflammatory response in various infectious and autoimmune diseases. IL-15 has recently been shown to be upregulated in T-cell-mediated inflammatory disorders. The observations suggest a potential role for this cytokine in a variety of pathologic conditions, including T(H)1-mediated and T(H)2-mediated inflammatory diseases. OBJECTIVE: In this study, we searched for single nucleotide polymorphisms in the whole IL-15 gene and investigated their association with inflammatory and/or atopic phenotypes. METHODS: The screening for single nucleotide polymorphisms was performed by single-strand conformation polymorphism analysis. Genotyping of the identified polymorphisms was performed by restriction fragment length polymorphism. Genotypic association analysis used the Armitage trend test. Haplotype frequency estimation and subsequent testing for differences between cases and controls were performed by using the programs FASTEHPLUS and FAMHAP. RESULTS: We identified 5 novel noncoding nucleotide sequence variants, all of which were typed in our asthmatic, our atopic, and our control population. According to the Armitage trend test, none of the 5 polymorphisms is associated with the phenotype bronchial asthma or atopy. However, multilocus haplotype analysis based on simulations to find out whether the haplotype frequencies differed between cases and controls by using the program FAMHAP yielded a P value of 6.1 x 10(-5) in the asthmatic versus the control population, which is highly significant. Furthermore, we obtained a nominally significant result of P=.0232 for the atopic versus the control population by using FAMHAP. CONCLUSION: These results strongly underscore previous findings that suggest a potential role of this cytokine in allergic diseases.

Adolescent↗
PubMed2004

Prediction of severity of symptoms in iatrogenic ovarian hyperstimulation syndrome by follicle-stimulating hormone receptor Ser680Asn polymorphism.

The ovarian hyperstimulation syndrome (OHSS) is a potentially life-threatening complication of ovarian stimulation treatments for in vitro fertilization (i.v.f.). Recently, three different mutations of the FSH receptor (FSHr) have been identified in patients who presented recurrent spontaneous OHSS. This prompted us to study a possible association between coding polymorphisms of the FSHr and the occurrence of iatrogenic OHSS. We sequenced the region of the FSHr gene encompassing the A307T and S680N polymorphisms of exon 10 of FSHr in 37 Caucasian females who developed OHSS after an IVF cycle in our fertility clinic, 130 Caucasian female patients who were treated by i.v.f. but never developed OHSS, and 99 Caucasian female controls. The FSHr allele frequencies in the Caucasian control population were identical to what has already been published (39% S680 61% N680). The control i.v.f. population was enriched in the S680 allele compared with the Caucasian control population (51% S680; 49% N680; P = 0.016). The OHSS population had a even higher enrichment in the S680 allele compared with the Caucasian control population (57% S680; 43% N680; P = 0.010). These results were unexpected, because the frequency of the S680 allele was previously found to be increased among poor responders to FSH stimulation. In a second phase, we studied FSHr allele frequencies according to the severity of OHSS. Interestingly, a significant enrichment in the allele N680 was observed as the severity of OHSS increased (P = 0.034). Bearing in mind the limitations of the small number of patients studied and the possibility of sampling biases, these results suggest that the genotype in position 680 of the FSHr cannot predict which patients will develop OHSS, but could be a predictor of severity of symptoms among OHSS patients.

Adult↗
PubMed1981

[Level of immunity against diphtheria among the personnel of a Hamburg hospital and in the normal population (author's transl)].

Diphtheria antitoxin titres were measured by passive haemagglutination in a total of 4542 blood samples obtained between the end of 1980 and beginning of 1981 from staff at Hamburg hospitals and from randomly selected age-matched persons (1219). Among the hospital personnel 67.5% had no protective diphtheria antitoxin (less than or equal to 0.11 IU/ml), compared with 52% among the control group. Among those aged 15-24 years, 60.2% of staff were unprotected, compared with 46.6% of the control population. The geometric mean value of the diphtheria antitoxins also gave a worse immunity level for hospital personnel (0.08 IU/ml) than the control population (0.14 IU/ml). While geometric mean titre values of hospital staff beyond the age of 45 fell nearly continuously, those in the control population rose with increasing age.

Adolescent↗
PubMed1989

[Long-term clinical results of coronary surgery. Apropos of 400 patients followed for 5 to 11 years].

Between 1976 and 1982 four hundred consecutive patients underwent coronary artery bypass surgery and were operated by the same surgical team: 345 men (88.5%) and 46 women (11.5%). The average age was 56 years (7.5% were over 75 years of age); 86% of patients were infunctional classes III and IV; 46% had triple vessel disease and 9.25% had severe stenosis of the left main stem. Left ventricular ejection fractions were decreased in 26% and very poor in 4.5% of patients. The average number of bypass grafts was 1.72 per patient and the operative mortality was 3.5%. The 10 year survival rate was 81% and 75% of these patients still thought that their condition had been improved by surgery although only 30% were completely asymptomatic and had had no further coronary event. A comparison with a control population of the same age showed better survival in the surgical group in patients surviving operation. Contrary to traditional thinking, the surgical patients suffered relatively few deaths of cardiac causes but as many, if not more, of cancer. The operated patients died of approximately the same diseases as the control population of the same age but in lower proportions for each cause of death (17 cardiovascular deaths in the control population compared with 13 in the operated group; 18 versus 10 deaths of cancer, and 18 versus 8 deaths of other causes in the control and operated patients, respectively).(ABSTRACT TRUNCATED AT 250 WORDS)

Actuarial Analysis↗
PubMed1996

Cancer incidence in 854 kidney transplant recipients from a single institution: comparison with normal population and with patients under dialytic treatment.

In this retrospective historical study, we compared the incidences of malignancies observed among 854 renal transplant recipients (RT) with at least 1 yr of follow-up, with the incidences of neoplasias among patients under regular dialytic treatment (RDT) and a control population from Northern Italy. Cox's proportional hazard model was used in RT recipients in order to evaluate the prognostic factors related to the development of neoplasia. Seventy six out of 854 RT patients (8.9%) developed some malignant neoplasia: 46% of these 76 were cutaneous neoplasias including melanomas, and the remaining 54% non cutaneous cancers: 33% miscellaneous tumors (MT), mostly adenocarcinomas, 17% Kaposi's sarcomas (KS), 4% non-Hodgkin's lymphomas (NHL). Malignancies had a higher incidence (p < 0.01) among RT recipients than among control and RDT patients. However, MT were equally frequent among the three groups. RDT patients on the contrary, had similar incidence of neoplasias when compared to the control population, but showed a lower incidence of squamous cell carcinomas (SCC). The risk ratios (RR) for the most frequent neoplasias among RT recipients vs. control population were: 224.7 for KS, 7.4 for NHL, 6.2 for SCC, 5.7 for basal cell carcinomas (BCC), 4.0 for MT. The risk of developing a de novo neoplasia was of about 13% at 10 yr and of 34% at 20 yr. In RT recipients, Cox's proportional analysis showed that age > 40 at transplantation and male sex were the only risk factors associated with an increased incidence of neoplasias, while no difference was observed between conventional (azathioprine+methylprednisolone: Aza+MP) and CsA therapy or in CsA monotherapy vs. double or triple therapy. However, KS occurrence correlated both with CsA dose (RR 15.2 for monotherapy; 12.5 for double therapy; 2.98 for triple therapy) and with 10 or more i.v. methylprednisolone pulses for treatment of rejection (RR 5.2). We conclude that in our series CsA does not increase the risk for development of neoplasias, when compared to conventional immunosuppression.

Adolescent↗