Table 4—

Diurnal differences in peak expiratory flow(PEF) and forced expiratory volume in one second (FEV₁) using home spirometry with electronic data storage

	Subjects n	PEF L·min⁻¹	FEV₁ L
6–11 yr olds
Female	51	16.4±5.6 (14.8–18.0)	0.10±0.04 (0.09–0.11)
Male	50	17.5±7.7 (15.4–19.7)	0.12±0.06 (0.11–0.14)
12–16 yr olds
Female	53	23.5±13.0 (19.9–27.1)	0.16±0.08 (0.13–0.18)
Male	50	18.2±5.8 (16.5–19.8)	0.14±0.09 (0.12–0.17)

Data are presented as mean±sd (95% confidence interval), unless otherwise stated.