A migrant study of pubertal timing and tempo in British-Bangladeshi girls at varying risk for breast cancer

Breast Cancer Research

Table 2 Hazard ratio (HR) and 95% CI for onset of adrenarche, thelarche, pubarche and menarche among Bangladeshi, British-Bangladeshi and white British girls

	Adrenarche			Thelarche			Pubarche			Menarche
	Number	HR	95% CI	Number	HR	95% CI	Number	HR	95% CI	Number	HR	95% CI
Unadjusted resident group
Bangladeshi	165	1.0		168	1.0		162	1.0		168	1.0
British-Bangladeshi	162	0.9	0.6, 1.3	159	1.6	1.1, 2.4	165	1.5	1.0, 2.3	174	1.4	0.8, 2.4
White British	50	1.0	0.6, 1.7	48	2.6	1.5, 4.4	49	2.0	1.1, 3.7	54	0.9	0.4, 2.1
P-trend		0.71			<0.01			<0.001			0.70
Resident group, adjusted for BMI
Bangladeshi	158	1.0		163	1.0		158	1.0		165	1.0
British-Bangladeshi	147	0.7	0.5, 1.1	149	1.1	0.7, 1.8	154	1.6	1.0, 2.7	156	1.0	0.5, 1.9
White British	46	0.9	0.5, 1.5	46	1.7	1.0, 3.1	47	2.2	1.1, 4.1	50	0.6	0.3, 1.6
P-trend		0.17			0.20			0.02			0.23

A higher HR indicates an earlier age at onset compared with the Bangladeshi reference group. BMI, body mass index.

ISSN: 1465-542X