Table 1. Demographic characteristics of the study population (Curitiba, Paraná, Brazil, 2016).

Age (yr)	n (%)	Total
10	260 (27.8)
11	321 (34.3)
12	207 (22.1)
13	87 (9.3)
14	59 (6.3)
Mean age*	11.32 (1.2)	934
Gender		934
Female	518 (55.4)
Male	416 (44.5)
Menarche		517
Yes	187 (36.1)
No	330 (63.8)
School type		934
Public	820 (87.7)
Private	114 (12.2)

*Numbers are given as mean and standard deviation (SD).