AJRCCM -- EISNER et al. 158 (1): 170 Table 4

TABLE 4
EFFECT OF SELF-REPORTED WEEKLY ENVIRONMENTAL TOBACCO SMOKE EXPOSURE DURATION ON ASTHMA OUTCOMES AT 18-MONTH FOLLOW-UP

ETS Exposure Category (n) Asthma Severity Score ( $beta$ ± SE ) Asthma-specific Quality of Life ( $beta$ ± SE ) SF-36 Physical Score ( $beta$ ± SE )

No exposure (referent group) 322 $---$ $---$ $---$

Baseline exposure, cessation at follow-up

1-2 h/wk ETS exposure 16 $-$ 1.7 ± 0.8^* $-$ 0.7 ± 3.0 2.4 ± 2.5

$>=$ 3 h/wk ETS exposure 27 $-$ 2.1 ± 0.7^* $-$ 2.8 ± 2.4 3.4 ± 2.0

Newly exposed over follow-up period

1-2 h/wk ETS exposure 32 $-$ 0.003 ± 0.6 $-$ 1.5 ± 2.2 1.6 ± 1.8

$>=$ 3 h/wk ETS exposure 24 1.4 ± 0.7^* 5.7 ± 2.5^* $-$ 2.2 ± 2.1

Continued exposure over follow-up

1-2 h/wk ETS exposure 15 1.1 ± 0.9 9.8 ± 3.1^* $-$ 3.2 ± 2.6

$>=$ 3 h/wk ETS exposure 15 $-$ 0.4 ± 0.9 $-$ 3.0 ± 3.1 $-$ 0.8 ± 2.6

Multiple linear regression analyses were adjusted for age, sex, race, income, and baseline asthma severity. Asthma-specific quality of life (QOL) analysis was also adjusted for baseline QOL in addition to baseline asthma severity. The SF-36 physical score analysis was adjusted for baseline SF-36 physical score in addition to baseline asthma severity. A negative $beta$ coefficient for either asthma severity or QOL indicates improved status; a negative $beta$ coefficient for SF-36 physical score indicates worsened status.

^* p < 0.05.

p = 0.08.