Table 3.

Multivariate-adjusted proportional hazards ratios for the association of mother’s age at menarche and relative timing of daughter’s menarche, stratified by race/ethnicity

Mother’s age at menarche (years)	n (%)	Hazards ratioa	95% confidence interval	p value
Asianb
<12	28 (30%)	1.49	0.86, 2.59	0.15
12–13	42 (45%)	1.00	Reference
>13	24 (26%)	0.43	0.22, 0.81	0.01
As a continuous variable		0.79	0.70, 0.90	0.0003
Whitec
<12	8 (12%)	3.82	1.53, 9.56	0.004
12–13	44 (66%)	1.00	Reference
>13	15 (22%)	0.27	0.11, 0.67	0.004
As a continuous variable		0.53	0.39, 0.72	<0.0001
Mixed, Asian/Whited
<12	34 (27%)	1.87	1.16, 3.02	0.01
12–13	71 (55%)	1.00	Reference
>13	23 (18%)	0.73	0.39, 1.36	0.32
As a continuous variable		0.77	0.64, 0.92	0.004
Mixed, part-Polynesiane
<12	36 (28%)	0.99	0.62, 1.59	0.96
12–13	76 (59%)	1.00	Reference
>13	17 (13%)	0.58	0.29, 1.13	0.11
As a continuous variable		0.88	0.76, 1.03	0.10

^aAdjusted for age and waist circumference

^b7 subjects missing mother’s age at menarche

^c4 subjects missing mother’s age at menarche

^d4 subjects missing mother’s age at menarche

^e5 subjects missing mother’s age at menarche