TABLE 7—

Multivariate cost analysis

Parameter	Relative cost ratio	95% CI
Sex
Male	1.00	0.9–1.11
Female	1.00
Age yrs
<5	1.02	0.76–1.37
5–10	0.83	0.64–1.06
11–15	0.54	0.4–0.72
16–20	0.61	0.47–0.79
21–30	0.54	0.42–0.7
31–40	0.72	0.56–0.93
41–50	0.74	0.57–0.96
51–60	0.73	0.55–0.96
61–70	0.89	0.67–1.17
>70	1.00
Asthma severity
Severe persistent	2.51	2.08–3.02
Moderate persistent	2.36	2.01–2.76
Mild persistent	1.60	1.4–1.84
Mild intermittent	1.00
Perceived asthma control
Uncontrolled	1.51	1.33–1.71
Controlled	1.00
Self-reported general health
Excellent	0.42	0.12–0.42
Very good	0.49	0.16–0.49
Good	0.57	0.19–0.57
Fair	0.77	0.26–0.77
Poor	1.18	0.38–1.18
Very poor	1.00