Logistic Regression: A Self-learning Text, Third Edition (Statistics in the Health Sciences)

Subject 1

E¼ 1 E¼ 0

D¼ 15025

D¼ 05075

Total 100 100

Subject 2

E¼ 1 E¼ 0

D¼ 12010

D¼ 08090

Total 100 100

Pooled subjects

E¼ 1 E¼ 0

D¼ 17035

D¼0 130 165

Total 200 200

14. Compare the baseline risk (whereE¼0) of Subject 1
    and Subject 2. Is there a difference (i.e., heterogene-
    ity) in the baseline risk between subjects?


15. Calculate the risk ratio for Subject 1 and Subject
    2 separately. Calculate the risk ratio after pooling the
    data for both subjects. How do the risk ratios
    compare?

594 16. Other Approaches for Analysis of Correlated Data