(c) For each of the three 32 tables in part (a), calculate the general-
ized odds and give your interpretation. How does this result compare
with those in part (b)?TABLE E1.25
Number of Men Surveyed
Factor Total With Number Gallstones
Smoking
Never 621 11
Past 776 17
Current 1342 33
Alcohol
Never 447 11
Past 113 3
Current 2179 47
Body mass index
(kg/m^2 )
<22.5 719 13
22.5–24.9 1301 30
b 25 : 0 719 181.26 Data were collected from 2197 white ovarian cancer patients and 8893
white controls in 12 di¤erent U.S. case–control studies conducted by
various investigators in the period 1956–1986. These were used to eval-
uate the relationship of invasive epithelial ovarian cancer to reproductive
and menstrual characteristics, exogenous estrogen use, and prior pelvic
surgeries. Data related to unprotected intercourse and to history of
infertility are shown in Table E1.26.
TABLE E1.26
Cases Controls
Duration of unprotected
intercourse (years)
< 2 237 477
2–9 166 354
10–14 47 91
b 15 133 174
History of infertility
No 526 966
Yes
No drug use 76 124
Drug use 20 11EXERCISES 45