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Biomedical subjects

J S Preisser

Publications and source records attributed to J S Preisser.

22 records · Page 2Linked to original sources
PubMed1997

A national survey of autopsy cost and workload.

We mailed survey questionnaires to a random sample of medicolegal offices throughout the USA. The survey asked how many forensic pathologists were used, their American Board of Pathology forensic examination (Board) status, how many autopsies they performed, and, if payment were fee-for-service, what fees were paid for medicolegal autopsies. Response rate was 61%, with 188 offices returning questionnaires. The average fee, was $518 with a standard error of $27. The number of fee-for-service autopsies was split evenly between Board qualified and Board ineligible pathologists, accounting for about one-third of medicolegal autopsies nationwide. Although smaller offices used more pathologists ineligible for forensic Boards, they paid a premium for such qualification. Larger offices used more forensic Board qualified pathologists, but paid them less than those ineligible to take the examination! Overall there was no significant premium paid for Board qualification. The average fee paid is far less than the published estimates of the cost of an autopsy. The low fees paid may reflect: (1) the value of the teaching experience supplied to medical students and/or residents; (2) pathologists performing medico-legal examinations as community service; and (3) the lower marginal cost of additional autopsies.

Autopsy↗
PubMed1993

Statistical considerations for cross-sectional data relating to tracheal reconstruction over time.

Complementary statistical analyses are performed on data concerning tracheal reconstruction in rats. The principal response criterion is vessel area as defined by the area of a graft onto the trachea covered by blood vessels. Postoperatively, this vessel area changes in a nonlinear fashion over time. Starting at 0% immediately postoperation, the vessel area increases to a peak and then sharply decreases to a certain level at which it remains. A total of 64 independently observed cross-sectional pairs (postop day, vessel area) are distributed among four treated groups. Analysis consists of two-way analysis of variance and piecewise linear regression under the usual assumptions of normality and variance homogeneity. Other analyses that relax these assumptions are also considered; treatment differences are established by nonparametric tests, and a quasi-likelihood analysis of the piecewise linear regression model is applied under the assumption of a binomial-like variance function. The resulting fit of the normal-theory-based piecewise linear model is compared to that of a nonlinear model whose shape is that of a gamma function integrand.

Analysis of Variance↗
PubMedDate not supplied

Physician and patient predictors of health maintenance visits.

BACKGROUND: Because of a strong association between health maintenance visits (HMVs) and cancer screening, knowledge of the predictors of an HMV have implications for screening. OBJECTIVE: To examine the association of an HMV with patient, physician, and practice characteristics in the primary care setting. DESIGN: A statewide study of cancer screening was conducted in Colorado to determine concordance with the National Cancer Institute's guidelines for screening for breast, cervical, prostate, and skin cancer. Medical records form patients were randomly chosen from primary care practices. Predictors of an HMV were determined by fitting a logistic model to baseline data, adjusting for the cluster sampling of patients within practices. SETTING: Nonacademic primary care practices in Colorado. PARTICIPANTS: A total of 5746 patients aged 42 to 74 years from 132 primary care practices. MAIN OUTCOME MEASURE: Whether a patient had an HMV in the previous year. RESULTS: Of all patients, 31% had an HMV in the previous year. Patient characteristics associated with having HMVs included nonsmoking status, odds ratio (OR) (95% confidence interval [CI]) of 1.27 (1.11-1.46), age, and sex. Women aged 50 to 69 years were significantly more likely to have an HMV than men aged 50 to 69 years (OR, 1.30; 95% CI, 1.10-1.54). Among adults aged 70 years and older, there were no significant sex differences in receiving HMVs. Physician and practice characteristics associated with providing HMVs included practice size (> or = 3 full-time physicians) (OR, 1.34; 95% CI, 1.01-1.77), physician contemplation of changing approaches to cancer screening (OR, 1.33; 95% CI, 1.04-1.70), and physician female sex (OR, 1.33; 95% CI, 1.04-1.70). Physician age and specialty (general internist or family physician) were not associated with the level of health maintenance delivery. CONCLUSION: Certain subgroups, such as smokers, patients in smaller practices, and physicians not yet considering changing their approach to cancer screening, could be targeted in future intervention studies designed to provide preventive services in primary care settings.

Adult↗