Lower age at menarche affects survival in older Australian women: results from the Australian Longitudinal Study of Ageing

Table 3 Summary of effect of lower age at menarche on 15-year survival

	Complete case analyses (n = 942)			Multiple imputation analyses (n = 1,031)
Model	HR	95% CI	P-value	HR	95% CI	P-value
1: Age adjusted
Menarche ≥ 12y	1.00			1.00
Menarche < 12y	1.35	1.05 - 1.73	0.018	1.30	1.02 - 1.65	0.032
2: Age + Health adjusted^a
Menarche ≥ 12y	1.00			1.00
Menarche < 12y	1.31	1.02 - 1.68	0.037	1.26	0.98 - 1.61	0.070
3: Age + Health + Lifestyle adjusted^b
Menarche ≥ 12y	1.00			1.00
Menarche < 12y	1.31	1.02 - 1.69	0.035	1.29	1.01 - 1.64	0.045
4: Age + Health + Lifestyle + Reproductive adjusted^c
Menarche ≥ 12y	1.00			1.00
Menarche < 12y	1.28	0.99 - 1.65	0.062	1.25	0.98 - 1.60	0.074

a: Overall analyses adjusted for age group, place of residence, and health variables (self-rated health, cognitive function, number of morbid conditions).
b: Overall analyses adjusted for age group, place of residence, health variables, and lifestyle variables (smoking status, exercise status, BMI category).
c: Overall analyses adjusted for age group, place of residence, health variables, lifestyle variables, and reproductive variables (parity, age at menopause, number of reproductive years)

ISSN: 1471-2458