Table 5.

Subgroup analysis for ischaemic heart disease mortality in women (stratified estimates only), 1980–2010

Subgroup	Average alcohol intake, g/day	Studies, No.	Relative Risk (95% CI)	P Value for Heterogeneity	I2, % (95% CI)
Age at time of event < 65 years
	Lifetime abstainer	4	1.00
	2.5–11.99	4	0.78 (0.60–1.00)	0.47	0(0–78)
	12–23.99	3	0.93 (0.59–1.46)	0.63	40 (0–66)
	24–35.99	3	0.69 (0.20–2.42)	0.036	70 (0–91)
Age at time of event ≥ 65 years
	Lifetime abstainer	4	1.00
	2.5–11.99	4	0.87 (0.72–1.05)	0.11	51 (0–84)
	12–23.99	4	1.00 (0.68–1.47)	0.17	0 (0–80)
	24–35.99	2	0.95 (0.68–1.32)	0.29	10 (0–41)

Abbreviations: CI, confidence interval.