[Retracted] Breastfeeding and Reduced Risk of Breast Cancer: A Systematic Review and Meta-Analysis

Table 3

Menarche age comparison of breast cancer and control cases.

Characteristics	[9]	[10]	[11]	[12]	[13]
Age at menarche (years)—breast cancer cases
>13	168	166	N/A	255	N/A
14-15	168	157	N/A	344	N/A
≥16	77	77	N/A	103	N/A
N (breast cancer cases)	404	400	148	706	360
Age at menarche (years)—control cases
>13	191	189	N/A	479	N/A
14-15	122	120	N/A	676	N/A
≥16	91	91	N/A	224	N/A
(control cases)	404	400	N/A	1381	57440