TABLE 1

Study groups

GroupNo. of subjectsMean ± SD (range)Sex (no. male:no. female)
Age (yrs)Wt (kg)
Outdoor SPF259.3 ± 4.1 (3.25–14.0)9.3 ± 3.0 (4.6–19.2)4:21
Outdoor non-SPF358.3 ± 4.6 (3.1–19.3)7.8 ± 2.7 (3.9–13.1)0:35
Indoor SPF64.8 ± 1.0 (3.9–6.3)7.4 ± 0.6 (6.6–8.2)4:2
Indoor non-SPF66.1 ± 2.6 (3.7–9.1)9.3 ± 3.8 (5.6–15.7)3:3