Table 5.

Effects of doubling fine fraction particulate matter (${\mathrm{PM}}_{2.5}$) concentrations on quality of life measures and two-week spirometry monitoring, adjusting for age, gender, and intervention assignment.

Outcome	Obs	Estimate	95% CI
PAQLQ
Overall	415	$-0.09$	($-0.16$, $-0.02$)
Symptoms	415	$-0.08$	($-0.16$, 0.001)
Limitation of activity activity	415	$-0.07$	($-0.16$, 0.03)
Emotion	415	$-0.10$	($-0.18$, $-0.03$)
Spirometry
Evening ${\text{FEV}}_1$	398	0.55	($-0.79$, 1.88)
Morning ${\text{FEV}}_1$	400	0.43	($-0.90$, 1.77)
Evening PEF	399	0.02	($-1.51$, 1.55)
Morning PEF	401	$-0.20$	($-1.68$, 1.28)
dPFV	396	0.64	($-0.05$, 1.34)

Note: dPFV, diurnal peak flow variability; ${\text{FEV}}_1$, forced expiratory volume in first second; Obs, observations; PAQLQ, pediatric asthma quality of life Questionnaire; PEF, peak expiratory flow.