| Título: | An examination of the proportionality of hazards in epidemiology / |
| Autores: | Scott, Susan C. (Susan Catherine) |
| Fecha: | 1992 |
| Publicador: | McGill University - MCGILL |
| Fuente: |
 |
| Tipo: | Electronic Thesis or Dissertation |
| Tema: | Biology, Biostatistics. |
| Descripción: | Additive and multiplicative statistical models in epidemiology invoke different assumptions regarding exposure-outcome relationships. While either may seem to provide an adequate fit in small data sets, a comparative parameter based on the correct set of assumptions will be more stable when applied in other contexts. Important implications of model selection and the scant literature on theoretical reasoning are presented. Given a lack of biological knowledge, a body of corroborative empirical knowledge would be helpful in choosing between statistical models. Traditionally, the fit of a multiplicative model is evaluated by a $ chi sp2$ test of homogeneity. However, this is a test rather than a measure and is sample-size dependent. In this thesis, the development of a new measure of heterogeneity of rate ratios, phi prime, is presented and applied to stomach cancer registry data. Results suggest homogeneity when comparing regions within countries, but some heterogeneity between continents. |
| Idioma: | en |
1 Investigations on the form-genera Beauveria and Tritirachium por MacLeod, Donald Murdock | 6 Treatment and recovery in first-episode psychosis : a qualitative analysis of client experiences por Windell, Deborah L. |
2 Seismic sensitivity of tall guyed telecommunication towers. por Ghodrati Amiri, Gholamreza. | 7 |
3 Exploring the Relationship Between Assets and Family Stress Among Low-Income Families por Rothwell, David W.,Han, Chang-Keun | 8 |
4 The case for asset-based interventions with indigenous peoples: Evidence from Hawai‘i por Rothwell, David W. | 9 |
5 Second Thoughts: Who Almost Participates in an IDA Program? por Rothwell, David W.,Han, Chang-Keun | 10 Recent contributions to the phenomenology of musical time : a critical survey por Beaudreau, Pierre |