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A case-control study was conducted in Auckland, New Zealand, to investigate the effects among regular drinkers of alcohol consumption on both nonfatal myocardial infarction and coronary death in the 24 hours after drinking. Data were tabulated separately for men and women (Table E1.8).

Drink in the Last 24 Hours	Myocardial Infarction		Coronary Death
	Controls	Cases	Controls	Cases
No	197	142	135	103
Yes	201	136	159	69

(a) Refer to the myocardial infarction data. Calculate separately for men and women the odds ratio associated with drinking.

(b) Compare the two odds ratios in part (a). When the difference is confirmed properly, we have an effect modification.

(d) Compare the two odds ratios in part (c). When the difference is confirmed properly, we have an effect modification.

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