Table 1

Study population (N=5392)

CharacteristicsAll subjects (n=5392)PP+
(n=1348)
PP−
(n=4044)
Age at HRCT (years), mean±SD66.9±7.267.2±6.666.9±7.4
Gender
 Men5160 (95.7%)1320 (97.9%)3840 (95.0%)
 Women232 (4.3%)28 (2.1%)204 (5.0%)
Maximal exposure level to asbestos
 Low232 (4.3%)22 (1.6%)210 (5.2%)
 Low intermediate1318 (24.4%)193 (14.3%)1125 (27.8%)
 High intermediate2316 (43.0%)529 (39.2%)1787 (44.2%)
 High1526 (28.3%)604 (44.8%)922 (22.8%)
CEI to asbestos (units-year), mean±SD67.7±102.8104.9±122.955.2±91.9
Time since first exposure (years), mean±SD, min — max47.4±8.7
8 — 74
48.4±7.6
9 — 74
47.1±9.1
8 — 74
Time since last exposure (years), mean±SD, min — max15.0±9.9
0 — 62
14.3±9.8
0 — 54
15.3±9.9
0 — 62
Smoking status
 Smoker412 (7.6%)99 (7.3%)323 (7.7%)
 Ex-smoker3463 (64.2%)951 (70.5%)2512 (62.1%)
 Non-smoker1517 (28.1%)298 (22.1%)1219 (30.1%)
  • CEI, Cumulative Exposure Index; HRCT, high-resolution CT; PP, pleural plaques.