Table 2

Distribution of interval from menarche to onset of regular menstrual cycles by age at menarche
age at menarche
≤10 11-14 ≥15
n (%) n (%) n (%)
time to onset of regular menstrual cycles
<1 year 439 (18) 7797 (19) 558 (17)
1-2 years 739 (31) 12356 (30) 879 (27)
3-4 years 558 (23) 8875 (22) 640 (19)
≥5 years 414 (17) 7618 (19) 681 (21)
Never 225 (9) 4388 (11) 540 (16)

Kruskal-Wallis test χ2 = 75.4, p < .0001.

Hosokawa et al.

Hosokawa et al. BMC Women's Health 2012 12:19   doi:10.1186/1472-6874-12-19

Open Data