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Results for “Morbidity--statistics”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

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At least 73 records · Page 4Linked to original sources
PubMed1990

Comparison between two methods of hydrostatic weighing without head submersion in morbidly obese females.

This study compared two methods of hydrostatic weighing without head submersion to conventional hydrostatic weighting in morbidly obese females. We concluded that hydrostatic weighing without head submersion is a valid alternative to conventional hydrostatic weighing especially when subjects are apprehensive in the water. The use of anthropometric head measures (HWNS-A) did not significantly improve the accuracy of the body composition assessment; therefore, elimination of these time consuming measurements in favor of the direct correction of head above Db is recommended.

Body Composition↗
PubMed1978

Autocategorization: a new technique for statistical comparisons of medical diagnoses.

Autocategorization is a new technique appropriate for studies involving relative frequencies of illness diagnoses using the International Classification of Diseases. It is ideally suited for emergency department illness patterns. The technique uses the standard chi-square statistical test, but is novel in objectively determining the aggregation of diseases into categories for analysis. The numbers of observed occurrences of the various diseases are used. without applying any a priori judgements, to decide whether a disease should be analyzed alone, or aggregated with others. This technique, because it is based on the ICDA code, will permit comparisons between various studies while retaining the statistical validity of the individual studies.

Computers↗
PubMed1985

The use of comparability ratios to adjust hospital trend data.

Hospital trend data may be affected by changes in diagnostic coding schemes. We studied the change from ICDA-8 (I-8) to ICD-9-CM (I-9) in a sample of roughly 13,600 double-coded Veterans Administration hospital diagnoses. Comparability ratios were computed and used to adjust trend data which overlap the time period when the shift from I-8 to I-9 occurred. With this adjustment for change in diagnostic coding scheme, apparent diagnostic trends are substantially altered.

Diagnosis↗
PubMed1986

A clinical perspective on aging.

Immobility, falls, incontinence, mental confusion and homeostatic disturbances are the major problems encountered in elderly patients. These occur with increasing frequency in the very old (age greater than 85) but studies have shown that the level of disability for those aged 65-84 remains no more than 15-20%. As at all ages, a small proportion of elderly experience most of the clinical problems. To improve our performance in managing these requires education of medical trainees, cooperation between acute and long-term care institutions and a concentrated program of biomedical research. Therapy designed to light up fading receptors or increase neurotransmitter function to maintain cerebral control mechanisms for posture, excretion and appetite control will achieve more than psychosocial or administrative attempts to solve such clinical problems.

Aged↗
PubMed1985

The health of the American slave examined by means of Union Army medical statistics.

The health status of the American slave in the 19th century remains unclear despite extensive historical research. Better knowledge of slave health would provide a clearer picture of the life of the slave, a better understanding of the 19th-century medicine, and possibly even clues to the health problems of modern blacks. This article hopes to contribute to the literature by examining another source of data. Slaves entering the Union Army joined an organization with standardized medical care that generated extensive statistical information. Review of these statistics answers questions about the health of young male blacks at the time American slavery ended.

Black or African American↗
PubMed1979

General right censoring and its impact on the analysis of survival data.

This paper concerns general right censoring and some of the difficulties it creates in the analysis of survival data. A general formulation of censored-survival processes leads to the partition of all models into those based on noninformative and informative censoring. Nearly all statistical methods for censored data assume that censoring is noninformative. Topics considered within this class include: the relationships between three models for noninformative censoring, the use of likelihood methods for inferences about the distribution of survival time, the effects of censoring on the K-sample problem, and the effects of censoring on model testing. Also considered are several topics which relate to informative censoring models. These include: problems of nonidentifiability that can be encountered when attempting to assess a set of data for the type of censoring in effect, the consequences of falsely assuming that censoring is noninformative, and classes of informative censoring models.

Clinical Trials as Topic↗
PubMed1979

Detecting systematic errors in multi-clinic observational data.

In multi-clinic studies it is hard to maintain a uniformly high quality of measurement and coding. Systematic errors almost always occur, in spite of the best of intentions and the most rigid protocols. It is the statistician's responsibility to plan for the detection of these errors, as well as to try to avoid them and not be misled by them. The practice of examining the univariate and multivariate sample frequency distributions of the variables under study, with an eye open for anything that looks puzzling, can be very helpful in detecting and trying to correct systematic errors that would bias the analysis. Examples are given from a 21-clinic study on pregnancy and child development.

Humans↗