Table 2

Data (n (%)) description of the non-malignant respiratory diseases case-control study

FranceAustria
CasesControlsCasesControls
*Percentage among subjects with known smoking habits; †as defined in the text; ‡smoker without further information; §in France subjects with a history of underground mining in other mines (two cases and five controls), or tunnelling (one case and two controls), in Austria underground talc mining (the case and the control are from site B).
Administrative information:
    Started employment<193015 (38)29 (25)
1930–194916 (41)46 (40)1 (100)2 (67)
≥19508 (21)41 (35)1 (33)
Smoking information:
Missing information3 (8)22 (19)1 (100)3 (100)
    Data source*Previous documents23 (64)53 (55)
Colleagues13 (36)43 (45)
    Classification*†Non-smoker16 (44)40 (43)
Light smoker6 (17)16 (17)
Heavy smoker14 (39)24 (26)
Smoker‡14 (15)
Occupational exposure:
Missing job history4 (3)
    Data sourcePrevious documents37 (95)99 (85)1 (100)3 (100)
Colleagues2 (5)13 (11)
    Employed asManual worker37 (95)100 (89)1 (100)2 (66)
Office worker2 (5)8 (7)1 (33)
Manager4 (4)
    Talc exposureNone6 (15)26 (22)1 (33)
Light12 (10 )
Medium6 (15)22 (19)1 (33)
Heavy27 (69)56 (48)1 (100)1 (33)
    Other exposuresQuartz†1 (3)2 (2)1 (100)1 (33)
Underground work§3 (8)7 (6)1 (100)1 (33)
Total3911613