Table 1

 Personal characteristics of the cohort of non-smoking adults with asthma, including participants in the direct SHS monitoring programme

Entire cohort of current non-smokers(n = 778)†Nicotine badge monitoring(n = 189)Hair sample(n = 138)
Unless otherwise indicated, the data are presented as n (%).
*p<0.05 v entire cohort of non-smokers (for example, nicotine badge group v entire cohort who did not wear nicotine badge; hair sample group v entire cohort who did not provide hair sample).
†Entire cohort n = 865 (87 current smokers (85 who reported smoking and two who had hair nicotine levels consistent with active smoking) were excluded).
Mean (SD) age (years)61 (16)63 (14)65 (13)*
Sex (female)546 (70%)125 (66%)97 (70%)
Race (non-white)310 (40%)56 (30%)*44 (32%)*
Educational attainment
    High school or less150 (19%)35 (19%)26 (19%)
    Some college442 (56%)104 (55%)69 (50%)
    College or graduate degree186 (24%)50 (26%)43 (31%)
Married or cohabiting with partner470 (60%)121 (64%)88 (63%)
Past cigarette smoking478 (61%)117 (62%)83 (60%)
Mean (SD) severity of asthma score12.7 (4.1)12.9 (3.8)12.9 (3.9)
Physical health status (SF-12)35 (12)34 (10)34 (11)