Biomedical subjects

J R Sheridan

Publications and source records attributed to J R Sheridan.

2 recordsLinked to original sources

PubMed1995

A regression method for analysing ordinal data from intervention trials.

We consider the case of a community intervention trial evaluated with a series of cross-sectional surveys and having outcomes measured on an ordinal scale. We propose a modelling procedure that combines ridit analysis and linear regression methods. We use the multinomial distribution as the basis for variance estimation of the mean ridits and then use simple regression models to estimate differences (for example, between intervention and comparison areas) among the ridits. We illustrate this procedure with data from a community intervention trial promoting condom use, with the adoption of consistent condom use measured on a 5-point ordinal scale.

Clinical Trials as Topic↗

PubMed1980

Patterns of primary drug abuse.

This study focuses on the relationship between patterns of primary drug abuse during 1976 for heroin, marijuana, cocaine, and amphetamines across the demographic variables of age at first use, education, race/ethnic, and sex. A sample of 162,062 clients was selected. Findings indicate that marijuana usage followed by heroin, amphetamines, and cocaine is the most common pattern for clients whose age at first use is 15. Clients with an age at first use of 16 show a pattern of heroin followed by marijuana, amphetamines, and cocaine. Blacks abuse heroin to a greater extent that either White or Spanish-speaking clients.

Adolescent↗