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. 2007 Mar 26;64(8):548–552. doi: 10.1136/oem.2006.031195

Table 1 Demographic and occupational characteristics of currently self‐employed and employed ECRHS II participants working in metalworking, soldering and welding jobs.

Self‐employed (n = 72) Employed (n = 371)
n (%) n (%)
Demographic characteristics
Age (years)
 Mean (SD) 42.8 (7.36) 42.2 (7.05)
 Median 41.8 41.7
 Minimum–maximum 29.0–54.2 28.8–55.5
Age at completion of full‐time education (years)
 Mean (SD) 19.7 (5.80) 19.3 (4.81)
 Median 18 18
 Minimum–maximum 10–50 8–46
Sex
 Female 6 (8.3%) 34 (9.2%)
 Male 66 (91.7%) 337 (90.8%)
Smoking status
 Current smoker 24 (33.3%) 113 (30.5%)
 Ex‐smoker 21 (29.2%) 121 (32.6%)
 Lifetime non‐smoker 27 (37.5%) 137 (36.9%)
Occupational characteristics
Number of occupations (metalworking, soldering, welding) per individual
 1 44 (61.1%) 238 (64.2%)
 2 16 (22.2%) 93 (25.1%)
 3 12 (16.7%) 40 (10.8%)
Metalworking (days/week)
 <1 4 (10.3%) 28 (12.6%)
 1–3 8 (20.5%) 27 (12.2%)
 4–7 27 (69.2%) 167 (75.2%)
 Total 39 (54.2%) 222 (59.8%)
Soldering (days/week)
 <1 19 (54.3%) 107 (66.9%)
 1–3 9 (25.7%) 31 (19.4%)
 4–7 7 (20.0%) 22 (13.8%)
 Total 35 (48.6%) 160 (43.1%)
Welding (days/week)
 <1 19 (50.0%) 81 (50.0%)
 1–3 13 (34.2%) 35 (21.6%)
 4–7 6 (16.8%) 46 (28.4%)
 Total 38 (52.8%) 162 (43.7%)