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PubMed2006

Validation of the SWAP-200 for diagnosing psychostructural organization in personality disorders.

BACKGROUND: The aim of the study was to investigate the validity of the prototype-matching, empirically based 200-item Shedler-Westen Assessment Procedure (SWAP-200) and its clinical utility for describing underlying dimensions of psychostructural organization and functioning. SAMPLING AND METHODS: Patients (n = 306) from two psychoanalytic out-patient departments were included. Replicatory and exploratory factor analysis, correlation and discriminant validity statistics, and canonical correlation analysis were performed. RESULTS: Replicatory factor analysis failed to reproduce the identical original factorial structure. Standard factor analysis revealed an eight-factor solution displaying a dimensional description of psychostructural personality organization (high functioning - neurotic/inhibited - borderline/emotionally dysregulated - psychotic/dissocial). Discriminant validity exists across the sample owing to high/poor psychological functioning. Canonical correlation analysis does not support the replacement of the Structured Clinical Interview for DSM-IV, but provides relevant implications for refining DSM-IV axis II. CONCLUSIONS: Support is given for the SWAP instrument in describing dimensional higher-order personality organization and psychostructural functioning.

Adult↗
PubMed2005

Genecology of Douglas fir in western Oregon and Washington.

BACKGROUND AND AIMS: Genecological knowledge is important for understanding evolutionary processes and for managing genetic resources. Previous studies of coastal Douglas fir (Pseudotsuga menziesii var. menziesii) have been inconclusive with respect to geographical patterns of variation, due in part to limited sample intensity and geographical and climatic representation. This study describes and maps patterns of genetic variation in adaptive traits in coastal Douglas fir in western Oregon and Washington, USA. METHODS: Traits of growth, phenology and partitioning were measured in seedlings of 1338 parents from 1048 locations grown in common gardens. Relations between traits and environments of seed sources were explored using regressions and canonical correlation analysis. Maps of genetic variation as related to the environment were developed using a geographical information system (GIS). KEY RESULTS: Populations differed considerably for adaptive traits, in particular for bud phenology and emergence. Variation in bud-set, emergence and growth was strongly related to elevation and cool-season temperatures. Variation in bud-burst and partitioning to stem diameter versus height was related to latitude and summer drought. Seedlings from the east side of the Washington Cascades were considerably smaller, set bud later and burst bud earlier than populations from the west side. CONCLUSIONS: Winter temperatures and frost dates are of overriding importance to the adaptation of Douglas fir to Pacific Northwest environments. Summer drought is of less importance. Maps generated using canonical correlation analysis and GIS allow easy visualization of a complex array of traits as related to a complex array of environments. The composite traits derived from canonical correlation analysis show two different patterns of variation associated with different gradients of cool-season temperatures and summer drought. The difference in growth and phenology between the westside and eastside Washington Cascades is hypothesized to be a consequence of the presence of interior variety (P. menziessii var. glauca) on the eastside.

Analysis of Variance↗
PubMed2001

Lower limb muscle power relationships in bilateral able-bodied gait.

OBJECTIVE: The purpose of this study was to test the hypothesis that limb propulsion is mainly associated with the interaction of a number of muscle power bursts developed throughout the stance phase and that the control actions are mainly achieved by the contralateral limb through different power-burst interactions. We also hypothesized that the power activities of the propulsion limb would be related to those of the control limb. DESIGN: Sixty gait trials of 20 subjects with dominant right hands and right legs were chosen for analysis. Each trial represents a performance of an able-bodied gait. Data were assessed using an eight-camera, high-speed, video-based system synchronized to two force plates. The muscle powers and their related mechanical energies were calculated at each joint and in each plane of the lower limbs by use of an inverse dynamic technique. The Pearson correlation method was used to determine the relationships within each limb by use of the data identified by principal component analysis, whereas a canonical correlation analysis was performed to illustrate the interaction between the limbs. RESULTS: Gait propulsion was an activity initiated by the hip shortly after heel-strike and maintained throughout the stance phase. Control was the main task of the left limb as evidenced by the power absorption bursts at the hip and knee. The left limb power generations were generally secondary to control activities and were possibly involved in adjustments to correct the other limb's propulsion. Interlimb interaction further emphasized the functional relationship between forward progression and control tasks developed by each limb and highlighted the importance of the frontal and transverse plane actions during gait. CONCLUSION: These results do not support the hypothesis that the ankle was a major contributor to forward progression.

Adult↗
PubMed1984

Reasons for drinking: motivational patterns and alcohol use among college students.

A principal components factor analysis of survey data from 393 college student drinkers (178 males) extracted four dimensions from a set of 16 reasons for drinking: avoidance, social, sensation seeking, and enjoyment. Motivational patterns and the relationships with alcohol use were examined with a canonical correlation analysis. Three significant canonical variates were found. The first variate contained students with high scores on all motivational factors. They were heavy drinkers with many alcohol-related problems. The second variate indicated that drinkers who drank primarily for enjoyment tended to be women who drank moderately. Male beer drinkers with strong sensation seeking motivations formed the third variate.

Adult↗
PubMed1985

Genetic variation in North Amerindian populations: covariance with climate.

Allelic frequencies at seven polymorphic loci in 74 North Amerindian populations are examined relative to patterns of climatic variation. Canonical correlation analysis reveals strong and significant associations of heterozygosity at the ABO, Ss, Duffy, and P loci with climatic variability. Principal component analysis demonstrates that these loci tend to form correlated ensembles. Moreover, canonical correlation analysis of component scores provides support for an association between polymorphism at these loci and environmental variability. The results are concordant with two previous investigations which suggested a relationship between polymorphism for the ABO, Duffy, and Diego systems and climate. It is suggested that the examination of broad geographic patterns of genetic variation at multiple loci is a valuable, but underutilized, method of screening for the effects of long-term systematic pressures.

Climate↗
PubMed2003

Relationship of dehydroepiandrosterone and its 7-hydroxylated metabolites to thyroid parameters and sex hormone-binding globulin (SHBG) in healthy subjects.

The concentrations of four immunomodulatory steroids, namely dehydroepiandrosterone (DHEA), its sulfate and its 7-hydroxylated metabolites, and sex hormone-binding globulin (SHBG) and major laboratory parameters of thyroid function were determined in sera from 104 healthy females and 48 males, screened for iodine deficiency in one region of the Czech Republic. The mutual relationships of the laboratory parameters were investigated by using four statistical approaches: correlation analysis, principal component analysis, canonical correlation and linear model relationship. In addition to expected correlations among thyroid parameters and substrate-product relationships among the steroids, several new relationships were revealed: The only thyroid parameter tightly correlating with SHBG was free triiodothyronine. The latter hormone was also associated with one of the 7-OH-DHEA epimers, namely with 7beta-OH-DHEA. Thyroid hormones are known to possess thermogenic properties, as does another 7-oxygenated DHEA metabolite, 7-oxo-DHEA, the major metabolite of which is 7beta-OH-DHEA. It may indicate a link between the two thermogenic factors. The results should serve for further investigation of changes in the thyroid hormone concentrations, together with SHBG and dehydroepiandrosterone metabolites, under various pathological situations.

Adolescent↗
PubMed2003

Influence of Fatty acids on foaming properties of cider.

Seventy-seven ciders from four consecutive harvests, which were produced at industrial scale by cider-makers from the region of Asturias (northern Spain), were analyzed to evaluate their foam capacity. The Bikerman method for the evaluation of foaming characteristics was adapted to ciders. In foaming, there are two parameters, foam formation and foam stability, which are found to be related to each other. To determine the relationship between fatty acid content and foaming properties of cider, the multivariate analysis technique of canonical correlation analysis was applied. Foam stability is positively related to the content of caprylic acid. Foam height is positively related to linolenic, pentadecanoic, and palmitic acid and negatively related to stearic and linoleic acid.

Beverages↗
PubMed1989

Burnout and coping strategies among hospital staff nurses.

This study examined the relationship between use of coping strategies and burnout among 150 randomly selected staff nurses from four hospitals. The instruments used were the frequency dimension of the Maslach Burnout Inventory (Maslach & Jackson 1981) and the Ways of Coping (Revised) (Folkman & Lazarus 1985). In the canonical correlation analysis, two significant canonical variate sets differentiated nurses on the dimension of burnout. Nurses who experienced increased levels of burnout used the coping strategies of escape/avoidance, self-controlling and confronting (P less than 0.001). Nurses who experience decreased levels of burnout used the coping strategies of planful problem solving, positive reappraisal, seeking social support, and self-controlling (P less than 0.003). Self-controlling coping, although present in both variate sets, was used to a lesser extent by nurses with decreased burnout levels. The positive relationship between planful problem solving and reduced burnout levels supports the theoretical framework of Lazarus. This framework asserts that during the appraisal process, persons evaluate the harmfulness of an event and their own coping resources. Persons with lower levels of burnout may perceive the event as amenable to change or they may perceive their coping resources as adequate. Either perception may promote the view that the situation is amenable to problem solving. Another rationale for the effectiveness of particular coping strategies may lie in the reactions that these strategies engender in others. The use of planful problem solving, seeking social support and positive reappraisal has been reported to result in the offering of greater social support than when confronting and self-controlling coping were used.(ABSTRACT TRUNCATED AT 250 WORDS)

Adaptation, Psychological↗
PubMed1993

Determinants of health-promoting lifestyles in older persons.

The purpose of this study was to determine the degree to which selected components derived from Pender's Health Promotion Model (1982) explained engaging in health promotion practices in a sample of 477 persons 65 years and older. One directional hypothesis was tested using canonical correlation analysis. Three significant canonical variates were demonstrated, explaining 88.7 percent of variance. Older healthy persons with high self-esteem and internal locus of control reported practicing five of the six health promotion strategies. Men with higher income and self-esteem but poorer health less often exercised or ate well. Older married subjects with higher incomes who were internally controlled were more likely to engage in exercise, health responsibility and stress management but not in interpersonal support. Findings provide direct multivariate support for the additive nature of the relationships posited in the Health Promotion Model.

Aged↗
PubMed1996

[A study on the concurrent validity of personality inventory from the view of the Five Factor Model concerning personality traits].

By using the Adjective Check List (ACL) in its Japanese version, the concurrent validity of a personality inventory is investigated through canonical correlation analysis and procrustes factor rotation from the view of the Five Factor Model concerning personality traits. After describing the objective of the present paper, the principles both of canonical correlation analysis and of incomplete orthogonal procrustes factor rotation to be used are explained. And, following the description concerning samples and data for analysis, the results both based on the scales and on the items of the personality inventory are presented. The important role of procrustes type of factor rotation in editing personality inventory is stressed before closing the discussion.

Adult↗
PubMed1998

Structure of the Coolidge Axis II Inventory Personality Disorder Scales from the five-factor model perspective.

Coolidge, et al. in 1994 tested the generality and comprehensiveness of the five-factor model of personality as applied to personality disorder by performing a canonical correlation analysis for the scales from the Coolidge Axis II Inventory and the NEO Personality Inventory testing 178 undergraduates (106 men and 72 women). Their results did not support the generality and comprehensiveness of the five-factor model for interpreting the structure of personality disorders. A major problem with this study was that the data did not show good simple structure and meaningfulness because no rotation was performed for the canonical variates. The present study tested the hypothesis that the results of Coolidge, et al. might be attributed to the failure to rotate canonical variates to obtain good simple structure. For 220 students in introductory psychology (104 men and 116 women), canonical correlation analysis with varimax rotation was performed for scores on the Coolidge Axis II Inventory scales and the NEO Five-Factor Inventory scales. The analysis indicated five canonical variate pairs which were interpreted as Neuroticism, Extraversion, Openness, Disagreeableness, and Conscientiousness, supporting the tested hypothesis as well as the generality and comprehensiveness of this model for describing the structure of personality disorders.

Adolescent↗
PubMed2006

Prognostic factors for primary superficial transitional cell carcinoma of the bladder: a retrospective cohort study.

BACKGROUND: Previous studies showed that the prognostic factors for superficial transitional cell carcinoma of the bladder varied with the findings of different cohorts. Few multivariate analyses of prognostic factors for superficial bladder tumors have been reported in China and bladder preservation as a prognostic index of superficial bladder tumors is limited and scarce in Chinese patients. This study was conducted to analyze a group of risk factors for prognostic outcomes for patients with primary superficial transitional cell carcinoma of the bladder. METHODS: Between January 1980 to December 2000, 198 patients [172 men and 26 women; mean age (52.98 +/- 11.28) years] with primary superficial transitional cell carcinoma who were pathologically classified as Ta or T1 in Hunan Provincial Tumor Hospital (Changsha, China) were enrolled in this study. Surgical methods included local resection and electric coagulation of bladder tumors, transurethral resection of bladder tumors and partial cystectomy. After initial surgical treatment, patients were followed through a cystoscopy every three months during the first two years and every six months thereafter in the design of retrospective cohort. Survival analysis was performed to analyze risk factors of the prognostic outcomes for transitional cell carcinoma of the bladder. Canonical correlation analysis was conducted to present and interpret synthetically the multi-correlation between all kinds of prognostic outcomes and risk factor in multiply dimensions. RESULTS: The average follow-up period was (6.65 +/- 4.74) years. Assessments at three, five, and 10 years showed recurrence rates, respectively, of (28.32 +/- 3.45)%, (35.31 +/- 3.83)%, and (42.48 +/- 4.40)%; progression rates of (8.89 +/- 2.14)%, (15.16 +/- 2.94)%, and (23.88 +/- 4.19)%; bladder-preservation rates of (94.68 +/- 1.74)%, (93.87 +/- 1.91)%, and (91.51 +/- 2.49)%; metastasis rates of (8.25 +/- 2.05)%, (11.24 +/- 2.47)%, and (28.94 +/- 4.93)%; and cancer-related survival rates of (95.02 +/- 1.62)%, (90.70 +/- 2.45)%, and (77.14 +/- 4.88)%. The main risk factors for recurrence were histological grade, blood transfusion during surgery and the duration of symptoms. Progression was affected by blood transfusion during surgery, histological grade, the number of re-examinations, and the length of the recurrence-free period. Metastasis was associated with tumor multifocality, hydronephrosis, microscopic growth pattern, and the recurrence-free period. Cancer-related survival was influenced by microscopic growth pattern and the recurrence-free period. Bladder preservation involved only the recurrence-free period. The comprehensive results from canonical correlation analysis showed that the main prognostic outcomes were cancer-related survival, metastasis and progression respectively, while the dominate risk factors were histological grade, tumor multifocality and blood transfusion. CONCLUSIONS: The risk factors were different for each prognostic outcome of transitional cell carcinoma of the bladder. This is helpful for predicting the prognosis of transitional cell carcinoma of the bladder and designing therapeutic and follow-up strategies for this cancer.

Adult↗
PubMed2006

[Insect community and its relationship with Ceroplastes japonicus occurrence in jujube orchards].

Employing community character indices and canonical correlation analysis, this paper studied the insect communi structure and its relationship with the occurrence degree of Ceroplastes japonicus in jujube orchards. The results showed that based on the community discrepancy coefficient of 0.20, the insect community in various sampling fields could be categorized into two groups, i. e. , plain and hill. The occurrence of C. japonicus in plain region was heavier, with lower insect community diversity, smaller species number, and higher dominance of phytophagous insects, while that in hill region was lighter, with higher insect community diversity, more abundant species, and higher dominance of natural enemy insects. Canonical correlation analysis indicated that at the significant level of 0.05, the first and second pairs of canonical correlation coefficients of C. japonicus occurrence characters and insect community characters were 0. 9904 and 0.8538, respectively, suggesting that the occurrence of C.japonicus was significantly correlated with the characters of insect community. Community diversity (with the coefficient of 3. 4893), species number (with the coefficient of 5.8060), and dominance (with the coefficient of 6.9353) had most important effects on the occurrence of C. japonicus.

Animals↗
PubMed1998

Soft tissue adaptability to hard tissues in facial profiles.

The purpose of this study was to investigate soft tissue adaptability to hard tissue. A canonical correlation analysis was performed in an attempt to assess the relationships between hard tissue structure and soft tissue profile in the static state. For the dynamic study, multiple-regression analysis was performed to identify the changes of soft tissue profiles associated with the retraction of upper and lower incisors. The samples comprised lateral cephalograms from 297 Japanese women for the static canonical correlation analysis and 32 sets of lateral cephalograms of pre- and posttreatment adult orthodontic patients for the dynamic multiple-regression analysis. In the static state, the vertical dimension of lower facial height and the position of the lower incisors were associated with the thickness of the upper-lip vermilion and soft tissue B, and the horizontal relationships between upper- and lower-jaw positions were associated with the thickness of upper lips and of pogonion (soft tissue chin). In the dynamic state, the results indicated that the changes of stomion and lower lip could be predicted and strongly reflected the changes of the hard tissue. On the contrary, the change of the upper lip showed a weaker association with the hard tissue changes. Predictions of chin form described by the soft tissue B and soft tissue pogonion were less accurate than estimates of upper- and lower-lip form. Chin form was influenced by the hard tissue structures such as ANB angle and lower-facial height rather than by changes in lower- and upper-incisor retraction.

Adaptation, Physiological↗
PubMedDate not supplied

Orthogonalization of block variables by subspace-projection for quantitative structure property relationship (QSPR) research.

A subspace-projection method is developed to construct orthogonal block variable, which is originally from some kinds of series of topological indices or quantum chemical parameters. With the help of canonical correlation analysis, the orthogonal block variables were used to establish the structure-retention index correlation model. The regression of only few new orthogonal variables obtained by canonical correlation analysis against retention index shows significant improvement both in fitting and prediction ability of the correlation model. Moreover, the quantitative intercorrelation between the different block variables of topological indices can also be evaluated with the help of the subspace-projection technique proposed in this work.

Journal Article↗
PubMed1987

Growth curve and morphometric variables in rats: are they related?

Four growth curve variables were measured in a population of rats in order to assess their association, if any, with a suite of morphometric characters. The growth curve variables (A = asymptotic weight, R = growth rate, P = percentage of asymptotic size at inflection, and G = time to grow from 10 to 90% of asymptotic size) were derived from Richards' curves applied to longitudinal body weight data, and the morphometric characters (measured in 189-day-old rats) consisted of 4 tooth and 7 bone variables. As assessed by a canonical correlation analysis, there was a significant association between the two sets of variables, especially between A and the skeletal variables. It was hypothesized that associations of the bone characters should be greater with A but less with R compared with those for the tooth characters, and this was shown to be the case. The canonical correlation analysis also showed a strong association of P with G in each sex, although in a factor analysis these two variables associated with R.

Aging↗