Table 3.

Children’s characteristics, district, usual activity, and reported low back pain

Characteristic	Number	Low back pain (%)	p value
Region
Center	101	21	0.008
Caniço	41	7
Periphery	59	5
Time walking to school
>30 min	83	19	<0.01
≤30 min	118	6
Age (years)
11–12	32	25	0.001
13–14	143	8
15–16	26	31
Sex
Male	92	11	0.33
Female	109	16
Playing sports
Never	70	14	0.48
<2 times/week	52	17
≥2 times/week	79	10
Time watching TV daily
≤1 h	55	11	0.52
>1 h	146	14