Table 1

Baseline characteristics of the study subjects and results of exposure assessment

Non-exposed workersEx-CS2 workersCS2 workers
*Arithmetic mean (SD); ‡geometric mean (GSD).
†Average exposure duration during the study period was 2.0 years.
Number352133259
Age (y)‡34.635.934.7
    <35137 (38.9%)43 (32.3%)108 (41.7%)
    35–44162 (46.0%)80 (60.2%)126 (48.6%)
    ⩾4553 (15.1%)10 (7.5%)25 (9.7%)
Smoking
    Never91 (25.9%)27 (20.3%)54 (20.8%)
    Former43 (12.2%)13 (9.8%)22 (8.5%)
    Current (<30 cigarettes/day)152 (43.2%)72 (54.1%)139 (53.7%)
    Current (⩾30 cigarettes/day)66 (18.8%)21 (15.8%)44 (17.0%)
Alcohol drinking
    Never or occasional46 (13.1%)23 (17.3%)39 (15.1%)
    Habitual (<45 g ethanol/day)244 (69.3%)90 (67.7%)169 (65.3%)
    Habitual (⩾45 g ethanol/day)62 (17.6%)20 (15.0%)51 (19.7%)
Body mass index (kg/m2)*22.6 (2.8)22.7 (2.7)22.2 (2.5)
Education (% ⩾high school)71.3%62.4%63.7%
Shift work (% shift workers)88.6%79.7%87.6%
Coronary prone behaviour pattern (%)20.2%18.9%18.9%
CS2 exposure duration prior to the study (yr)‡10.9 (2.3)10.9 (2.3)
CS2 concentration over the study period (ppm)‡2.9 (1.8)†5.0 (1.8)
TTCA over the study period (mg/g creatinine) ‡1.3 (1.5)†1.6 (1.9)