Table 3.

Calculation of odds ratios using sample OC values and coefficient information derived from Table 2^⁎.

	Blubber OCs (μg/g)	ln blubber OCs	PCBs		DDTs
			Coefficient	Odds ratio	Coefficient	Odds ratio
Cancer	100	4.605	0.883	Exp(4.605*0.883)/ Exp(2.303*0.883) = 7.63	0.780	Exp(4.605*0.780)/ Exp(2.303*0.780) = 6.02
	10	2.303
Infectious disease	100	4.605	0.830	Exp(.830*4.605)/ Exp(.830*2.303) = 6.76	0.705	Exp(.705*4.605)/ Exp(.705*2.303) = 5.07
	10	2.303

^⁎95% CI of OR is calculated in a similar manner, using coefficient ± 1.96*S.E.