TABLE 2 ASTHMA SEVERITY, ASTHMA-SPECIFIC QUALITY OF LIFE, AND HEALTH STATUS AT BASELINE AND 18-MONTH FOLLOW-UP IN SUBJECTS WITH DIFFERENT CATEGORIES OF SELF-REPORTED ENVIRONMENTAL TOBACCO SMOKE EXPOSURE No Exposure at Either Time (n = 322) Exposure at Baseline, None at Follow-up (n = 43) None at Baseline, Exposure at Follow-up (n = 56) Exposure at Baseline and Follow-up (n = 30) Severity-of-asthma score*, mean ± SE Baseline 10.9 ± 0.3 13.6 ± 0.9 11.6 ± 0.9 11.3 ± 1.0 18-mo follow-up 10.1 ± 0.3 10.4 ± 0.8§ 11.4 ± 0.8 10.9 ± 0.9 Asthma-specific QOL, mean ± SE Baseline 21.1 ± 0.8 25.3 ± 2.1 22.7 ± 2.1 24.2 ± 2.4 18-mo follow-up 18.8 ± 0.7 19.6 ± 2.2§ 21.4 ± 2.2 23.7 ± 3.1 SF-36 physical score, mean ± SE Baseline 46.2 ± 0.6 41.4 ± 2.0 45.3 ± 1.7 45.5 ± 2.5 18-mo follow-up 46.6 ± 0.6 46.7 ± 1.5§ 45.8 ± 1.7 44.4 ± 2.3 SF-36 mental score, mean ± SE Baseline 46.2 ± 0.4 46.6 ± 1.4 45.4 ± 1.1 44.0 ± 1.8 18-mo follow-up 46.0 ± 0.4 45.8 ± 1.1 44.9 ± 1.0 43.3 ± 1.5 * Higher severity-of-asthma scores indicate greater asthma severity. Higher asthma-specific quality of life (QOL) scores indicate worse QOL. Higher SF-36 physical and mental scores indicate better health status. § p < 0.05 in paired comparison of 18-mo follow-up score with baseline score.