Table 1

Characteristics and SHS exposure of 1,562 non-current smoking workers in the U.S. unionized trucking industry
Continuous variables Median (IQR)
Age (years) 54 (48–61)
BMI (kg/m2) 29.0 (25.8-31.3)
Total years lived with smokers (years) 20 (7–30)
Pack-years of active smoking* 15 (5–30)
Years since quit smoking* 22 (17–30)
Categorical Variables N (%)
Male 1331 85.2
Caucasian 1404 89.9
Former smoker 692 44.3
Job title
  Terminal worker 203 13.0
  Driver 791 50.6
  Office worker 228 14.6
  Retired 308 19.7
Region of Residency
  South 494 31.6
  West 278 17.8
  Midwest 521 33.4
  Northeast 269 17.2
Living in urban area 1034 66.2
Exposed to SHS in the past 7 days 990 63.4
Current SHS exposure
  Recent home exposure 158 10.4
  Recent workplace exposure 413 30.6
  Recent recreational exposure 1127 80.5
Childhood SHS exposure 1077 70.1
Respiratory symptoms
  Chronic cough 153 9.8
  Chronic phlegm 183 11.7
  Any wheeze 718 47.8
  Any symptom 793 50.8

IQR = interquartile range; BMI = body mass index.

* Among never smokers and former smokers who quit at least 10 years before completing the questionnaire.

Laden et al.

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

Open Data