Table 3.

Adjusted average asthma-related monthly costs

Outcome, mean (95% CI)	Fluticasone propionate-salmeterol (n = 747)	ICS + montelukast (n = 747)	Difference (CI difference)*
Total	$165 ($61, $467)	$316 ($129, $814)	$151 ($67, $346)
Medical	$57 ($1, $1232)	$121 ($4, $1980)	$64 ($3, $748)

Notes:

^*P < 0.05 based on a gamma-distributed generalized linear model with a log-link function controlling for patient age, Charlson comorbidity index, geographic location, gender, presence of allergic rhinitis, number of canisters of inhaled short-acting beta-agonists, oral corticosteroid prescription count, ICS prescription count, and number of hospitalizations/ED visits.

Abbreviations: CI, confidence interval; ICS, inhaled corticosteroid.