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Tests of Hypotheses in Density Follow-Up Studies

✍ Scribed by B. M. Bennett

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
217 KB
Volume
32
Category
Article
ISSN
0323-3847

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✦ Synopsis

This paper discusses statistical methods for situations in which two or more ( k + l ) exposure groups, including a reference one, are compared with mpect to rate ratios, or incidence density ratios (IDR) (e.g. ~T T M E N , 1976). Data are assumed availablf on population times (PT) experienced in the exposure groups.

The logit transformation or its generalizations (e.g. Cox, 197C are utilized in order to obtain Fitable tests for the hypotheses involved. Three examples i l l d r a t e these methods, including approximate and exact confidence limits for the IDRs (k = 1). For the case of ( E + 1) groups a linear contrast for the hypothesis of a trend is derived as well as its standard error.

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