Table 4.

Summary of effect modification on additive and multiplicative scales.

	Multiplicativea		Additiveb
	Ratio of RRs (95% CI)	p value	RERI (90% CI)	p value
BMI	0.89 (0.32, 2.46)	0.82	0.12 (−2.31, 2.54)	0.94
WC	0.79 (0.33, 1.90)	0.60	− 0.21 (−1.82, 1.40)	0.83
BF	1.29 (0.56, 3.02)	0.55	0.48 (−0.90, 1.87)	0.57
WhtR	0.84 (0.31, 2.22)	0.72	− 0.09 (−2.17, 1.98)	0.94

^aRatio of RRs_{4th DII vs 1st DII} across strata of obesity.

^bRERI = RR_{obese, 4th DII} - RR_{obese, 1st DII} - RR_{non-obese, 4th DII} +1.