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J R Rogers

Publications and source records attributed to J R Rogers.

16 recordsLinked to original sources

Cross-validation of the five-factor interpretive model of the Suicide Opinion Questionnaire.

This study is a cross-validation analysis of the five-factor interpretative model of the Suicide Opinion Questionnaire (Domino, Moore, Westlake, & Gibson, 1982) reported by Rogers and DeShon (1992). Results indicated moderate support for the five-factor model. That is, although the factor analysis results generally supported the 5-factor model, a number of items loaded equally well across 2 or more factors. Additionally, internal consistency and test-retest reliabilities ranged from .48 to .85 and from .34 to .92, respectively, indicating weaknesses in some of the subscales. Strategies are suggested for the future psychometric development and refinement of the instrument.

Adult

Assessing the "modeling effect" in parasuicidal behavior: a comment on Platt (1993)

This article provides a critical evaluation of Platt's [1993] research investigating the role of modeling in the acquisition of parasuicidal behavior. The discussion focuses on general theoretical and methodological issues related to research in this area, as well as on specific concerns regarding Platt's investigation. In addition to presenting a critique of this research, a hypothetical model is presented that should lend credibility to future investigations into the theoretically posited casual relationships within the modeling paradigm. Model selection was based upon a recognition that an adequate test of the observational learning theory would need to appropriately employ correlational data commonly found in research in suicide and parasuicide. The implications for clinical practice are presented.

Attitude

A reliability investigation of the eight clinical scales of the Suicide Opinion Questionnaire.

The Suicide Opinion Questionnaire (SOQ) has been employed in a variety of settings as a measure of attitudes toward suicidal behavior. However there has been a lack of consensus across these studies with regard to the underlying factor structure of the measure. In addition there has been little empirical information reported in the literature regarding the scale's reliability. This article presents a psychometric investigation of the 8-factor clinical model of the SOQ as representing the most appropriate interpretive model for the SOQ. Factor-analytic and internal consistency reliability results failed to support the hypothesized 8-factor model. An alternative factor scheme and suggestions for future research on the SOQ are discussed.

Adult

End-stage renal failure in children: 16 years' experience at one Australian centre.

Sixty-five children over one year and under 15 years of age began treatment for end-stage renal failure between 1973 and 1988. Sixty-one renal transplants were performed in 53 children, 39 of these were from living donors (38 were first-degree relatives and one was an emotionally related volunteer). Thirteen children, of whom seven had received transplants and six had not, died, including three children with functioning transplants; nine deaths occurred in the first eight years of the programme. Cumulative five-year and 10-year patient survival rates were 78% and 75%, respectively. Eighteen transplants failed, 12 as a result of rejection, five as a result of disease recurrence and one due to primary non-function. Cumulative five-year and 10-year transplant survival rates for first grafts were 66% and 53%, respectively. For living donor transplants these rates were 85% and 68%, respectively. Growth rates fell by 0.4 +/- 0.05 standard deviation score (SDS) per year in children undergoing dialysis, were normal in children with renal transplants receiving prednisone (change in SDS per year, -0.02 +/- 0.08) and increased by 0.36 +/- 0.07 SDS per year in children with transplants receiving cyclosporin A alone. Currently, 32 (82%) of 39 transplant recipients and 7 (58%) of 12 patients undergoing dialysis attend school or work full time. Although both dialysis and transplantation are acceptable therapies for children with end-stage renal failure, successful transplantation provides the best opportunity for satisfactory growth and development.

Actuarial Analysis

Metric analyses of the teeth and faces of South Australian twins.

Procedures are described for the acquisition and analysis of data in a study of the dental and facial characteristics of South Australian twins. Comparisons of the mesiodistal diameters of maxillary incisors in MZ and DZ twins revealed heterogeneity of total variances and evidence of inequality of mean values for some dimensions between MZ and DZ twins. Previous estimates of heritabilities for tooth size, relying on classical assumptions in twin research, may be exaggerated. A preliminary analysis of facial shape was undertaken using a procedure for shape matching based on a least squares fit of homologous coordinates. There was evidence of mirror-imaging in some MZ twin pairs and differences in facial asymmetry between male and female DZ twins. Future extensions of the study using methods for three-dimensional shape analysis are described.

Adolescent

Treatment of renal transplantation rejection. Cyclosporin A versus conventional treatment with azathioprine, prednisone and antithymocyte immunoglobulin in primary cadaveric renal transplantation.

In a prospective randomized clinical trial to compare treatment with cyclosporin A to conventional treatment with azathioprine, prednisone and antithymocyte immunoglobulin in cadaveric renal transplantation, 34 patients were entered into both treatment groups and were examined regularly for seven to 43 months. Renal graft survival at one year was 72% among patients receiving cyclosporin A therapy and 75% among those receiving conventional therapy. Rejection was a frequent complication of both treatments; irreversible rejection occurred in six patients receiving treatment with cyclosporin A and in 10 patients receiving conventional therapy. The nephrotoxicity of cyclosporin A was its main side-effect. A similar proportion of kidneys in both groups (65% and 69%) were initially affected with post-transplant oliguria, but recovery of function took significantly longer in the group receiving cyclosporin A therapy (median, 29 days versus 11 days, P less than 0.001). The results of this pilot study suggest that cyclosporin A can be used safely in patients with post-transplantation oliguria, and indicate that long-term graft survival with cyclosporin A is comparable to that achieved with azathioprine, prednisone and antithymocyte immunoglobulin.

Adolescent

Synovial fluid lactic acid in septic and nonseptic arthritis.

We determined lactic acid levels by the lactic dehydrogenase method in synovial fluid of 41 patients with various rheumatic diseases, to test the concept that significantly elevated values were diagnostic of septic arthritis. Nine patients had septic arthritis, 15 rheumatoid arthritis (RA), and the remainder miscellaneous conditions. In another 9 patients with different rheumatic diseases, including 1 with septic arthritis, synovial fluid lactic acid was determined by both the lactic dehydrogenase and gas-liquid chromatography methods. There was a wide scatter of values among patients with septic and nonseptic inflammatory arthritis, and much overlap occurred. We could not differentiate septic arthritis from RA on the basis of synovial fluid lactic acid levels. Results were similar with both procedures for determining lactic acid levels.

Arthritis, Infectious

Spatial distribution of [14C]-lidocaine and blood flow in transmural and lateral border zones of ischemic canine myocardium.

The purpose of this study was to determine the spatial distribution of lidocaine relative to blood flow in ischemic, normal and border zone canine myocardium. Ischemic zone tissue was distinguished from normal zone tissue by a special microsphere technique in adjacent sections 4 to 5 mm wide from the center to the lateral border of the ischemic region in 14 open chest dogs. Gamma-labeled microspheres were separated by a special technique from carbon-14 ([14C])-lidocaine in the same tissue sample. Blood flow (mean value +/- 1 standard deviation) was reduced to 46 +/- 25 percent of normal in the ischemic subepicardium and 17 +/- 18 percent of normal in the subendocardium. [14C]-lidocaine was 0.56 +/- 0.12 microgram/g in normal myocardium 10 minutes after bolus injection of [14C]-lidocaine; it was reduced to 91 +/- 15 percent of normal in ischemic subepicardium and 58 +/- 12 percent of normal in the subendocardium. Blood flow and lidocaine concentration were uniformly lowest in gross samples from the central and intermediate ischemic zones, and highest in the gross samples from the border normal zone (p less than 0.05). The values for flow and lidocaine in samples from the border ischemic zone were intermediate, that is, higher than values from central ischemic (p less than 0.05) and lower than values from border normal zone samples (p less than 0.05). However, the labeling technique for normal zone tissue revealed that the values of blood flow and lidocaine in the gross samples from the lateral border of the ischemic zone were intermediate between those of adjacent ischemic and normal samples because of the mixture of overlapping normal and ischemic tissues components--not because of a unique mildly ischemic region. Both blood flow and lidocaine concentration were lower in the subendocardial third than in the subepicardial third of the ischemic zone (p less than 0.05) even after the contribution of normal zone tissue was subtracted, suggesting a gradient of ischemia across the transmural border zone. In conclusion, lidocaine is distributed uniformly in ischemic components from the center to the lateral border of the ischemic zone, but there is an endocardial to epicardial gradient. Both lateral and transmural border zone distributions must be considered to understand the mechanisms of drug effects in myocardial ischemia.

Animals

Cannabis roots.

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Cannabis