Table 2.

 Effect of intervention on lung function in children

Variable	No of person days	No of children	Unadjusted			Adjusted*
			Effect size (β) (95% CI)	P value		Effect size (β) (95% CI)	P value
Amplitude % mean peak expiratory flow rate	26 439	359	1.41 (−2.80 to 5.62)	0.51		1.41 (−2.80 to 5.62)	0.62
Daily FEV1	26 960	360	130.7 (−20.3 to 281.7)	0.09		129.4 (−21.4 to 280.3)	0.09
Morning FEV1	22 157	346	57.6 (−74.8 to 190.1)	0.40		57.0 (−75.4 to 189.4)	0.4
Evening FEV1	23 406	353	121.7 (−37.0 to 280.3)	0.13		120.6 (−38.1 to 279.4)	0.14
Daily peak expiratory flow rate	27 007	360	12.29 (−4.57 to 29.15)	0.15		12.12 (−4.76 to 29.00)	0.16
Morning peak expiratory flow rate	22 450	347	9.01 (−7.54 to 25.56)	0.28		8.92 (−7.66 to 25.50)	0.29
Evening peak expiratory flow rate	23 413	353	12.30 (−4.14 to 28.74)	0.14		12.17 (−4.3 to 28.63)	0.15
Percentage predicted†:
FEV1	22111	283	2.46 (−11.62 to 16.54)	0.73		2.6 (−11.52 to 16.73)	0.72
Morning FEV1	18 465	276	−1.07 (−12.62 to 10.49)	0.85		−0.87 (−12.46 to 10.72)	0.88
Evening FEV1	19 279	280	2.60 (−12.00 to 17.20)	0.73		2.59 (−12.05 to 17.24)	0.73
Peak expiratory flow rate	22 139	283	3.54 (−1.41 to 8.48)	0.16		3.56 (−1.39 to 8.52)	0.16
Morning peak expiratory flow rate	18 613	276	2.99 (−1.77 to 7.75)	0.22		3.01 (−1.77 to 7.78)	0.22
Evening peak expiratory flow rate	19 279	280	3.65 (−1.14 to 8.45)	0.14		3.68 (−1.13 to 8.49)	0.13

FEV₁=forced expiratory volume in one second.

ß coefficients are estimated effect size of intervention on peak expiratory flow rate and FEV₁.

*Controlled for baseline measure.

†Percentage of predicted FEV₁ or peak expiratory flow rate based on 283 available heights.