Table 2

Association between SHS exposure and respiratory symptoms among 1,562 non-smoking workers a
SHS exposure Chronic cough Chronic phlegm Any wheeze
OR 95% CI OR 95% CI OR 95% CI
Total recent exposureb
 Exposed to SHS in past 7 days 1.46 1.00 - 2.13 1.55 1.08 - 2.21 1.76 1.41 - 2.21
Current exposure by locationb,c
 Recent workplace exposured 1.74 1.14 - 2.67 1.75 1.16 - 2.65 1.20 0.90 - 1.60
 Recent home exposuree 0.74 0.37 - 1.48 0.76 0.41 - 1.42 0.90 0.60 - 1.35
 Recent recreational exposuref 0.91 0.55 - 1.50 1.24 0.74 - 2.09 2.03 1.45 - 2.83
Childhood exposure
 Lived with ≥1 smoker during childhood 1.21 0.81 - 1.80 1.84 1.24 - 2.75 1.16 0.91 - 1.47
Life-time home exposure
 Less than 10 years Ref -- Ref -- Ref --
 10-19 years 1.39 0.84 - 2.31 1.86 1.15 - 3.03 1.21 0.90 - 1.63
 20-29 years 1.75 1.04 - 2.94 1.92 1.16 - 3.18 1.17 0.85 - 1.60
 at least 30 years 1.35 0.79 - 2.32 1.91 1.15 - 3.17 1.30 0.94 - 1.79
p trend = 0.29 p trend = 0.02 p trend = 0.12

a Logistic regression models adjusted for age, sex, race, job title, former smoking, pack-years, years since quitting, BMI, region of country, and urban residence among never smokers or former smokers who quit at least 10 years before completing the questionnaire.

b Additionally adjusted for childhood exposure to SHS.

c Location specific exposures were all modeled simultaneously.

d Exposure at work in the past 2 work days.

e Recent exposure at home in an average week.

f Recent exposure outside of home and work in an average week.

Note: trend analyses are estimated using the median value of each category.

Laden et al.

Laden et al. BMC Public Health 2013 13:93   doi:10.1186/1471-2458-13-93

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