Table 1.

Sample characteristics by age group

Age groupN femaleN maleNAge in days (range)Age in days (mean)
1–2 years171734369–724530.6
2–3 years81624745–1094918.7
3–4 years312151095–14511302.7
4–5 years1111221501–18091680.0
5–6 years310131859–21992012.5