Table 1:

Distribution of the study population by age and sex (n = 718)

Age Class (yr)	Boys (n = 372)	Girls (n = 346)	All (n = 718)
Younger than 1	58	56	114
1–2	37	32	69
2–3	39	28	67
3–4	31	22	53
4–5	27	23	50
5–6	20	21	41
6–7	30	18	48
7–8	17	17	34
8–9	9	16	25
9–10	16	12	28
10–11	10	12	22
11–12	11	14	25
12–13	11	18	29
13–14	13	20	33
14–15	17	19	36
15–16	26	18	44