Table 1.
Selected characteristics of male lung cancer cases and controls included in the pooled analyses on lung cancer risk among bricklayers, the SYNERGY study, 1985–2010
| Ever bricklayers |
Never bricklayers |
All |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cases |
Controls |
Cases |
Controls |
Cases |
Controls |
|||||||
| No. | % | No. | % | No. | % | No. | % | No. | % | No. | % | |
| All subjects | 695 | 100 | 469 | 100 | 14,913 | 100 | 18,062 | 100 | 15,608 | 100 | 18,531 | 100 |
| Age (years) | ||||||||||||
| Mean (SD) | 62.5 | (9.0) | 63.0 | (9.3) | 62.7 | (9.0) | 62.2 | (9.5) | 62.7 | (9.0) | 62.2 | (9.5) |
| Cigarette smoking | ||||||||||||
| Never | 15 | 2.2 | 107 | 22.8 | 647 | 4.3 | 5,194 | 28.9 | 662 | 4.2 | 5,301 | 28.6 |
| Former (≥2 years) | 336 | 34.0 | 230 | 49.0 | 5,186 | 34.8 | 7,859 | 43.5 | 5,422 | 34.7 | 8,089 | 43.6 |
| Current | 442 | 63.6 | 131 | 27.9 | 8,956 | 60.0 | 4,867 | 26.9 | 9,398 | 60.2 | 4,998 | 27.0 |
| Unknown | 2 | 0.3 | 1 | 0.2 | 124 | 0.8 | 142 | 0.8 | 126 | 0.8 | 143 | 0.8 |
| Cigarette pack-years | ||||||||||||
| Mean/Median (SD) | 45.2/42.0 | (27.7) | 23.3/18.0 | (24.2) | 42.4/38.3 | (29.0) | 20.2/13.2 | (24.1) | 42.6/38.5 | (28.9) | 20.3/13.5 | (24.1) |
| Other tobacco only | ||||||||||||
| Ever | 6 | 0.9 | 12 | 2.6 | 188 | 1.3 | 558 | 3.1 | 194 | 1.2 | 570 | 3.1 |
| Education | ||||||||||||
| None | 37 | 5.3 | 21 | 4.5 | 404 | 2.7 | 242 | 1.3 | 441 | 2.8 | 263 | 1.4 |
| Some primary | 186 | 26.8 | 97 | 20.7 | 2,975 | 19.9 | 2,538 | 14.0 | 3,161 | 20.3 | 2,635 | 14.2 |
| Primary/some secondary | 378 | 54.4 | 263 | 56.1 | 6,598 | 44.2 | 7,078 | 39.2 | 6,976 | 44.7 | 7,341 | 39.6 |
| Secondary/some college | 69 | 9.9 | 71 | 15.1 | 2,577 | 17.3 | 4,170 | 23.1 | 2,646 | 17.0 | 4,241 | 22.9 |
| University | 10 | 1.4 | 13 | 2.8 | 1,456 | 9.8 | 3,066 | 17.0 | 1,466 | 9.4 | 3,079 | 16.6 |
| Unknown | 15 | 2.2 | 4 | 0.8 | 903 | 6.1 | 968 | 5.4 | 918 | 5.9 | 972 | 5.3 |
| Ever employed in list A/B1 | ||||||||||||
| No | 465 | 66.9 | 344 | 73.3 | 9,158 | 61.4 | 12,697 | 70.3 | 9,623 | 61.6 | 13,041 | 70.4 |
| List B | 78 | 11.2 | 26 | 5.5 | 2,073 | 13.9 | 2,185 | 12.1 | 2,151 | 13.8 | 2,211 | 11.9 |
| List A | 152 | 21.9 | 99 | 21.1 | 3,682 | 24.7 | 3,180 | 17.6 | 3,834 | 24.6 | 3,279 | 17.7 |
| Lung cancer morphology | ||||||||||||
| Squamous cell carcinoma | 309 | 44.5 | 6,105 | 40.9 | 6,414 | 41.1 | ||||||
| Small cell carcinoma | 140 | 20.1 | 2,286 | 15.3 | 2,426 | 15.5 | ||||||
| Adenocarcinoma | 150 | 21.6 | 3,864 | 25.9 | 4,014 | 25.7 | ||||||
| Other/unknown | 96 | 13.8 | 2,658 | 17.8 | 2,754 | 17.6 | ||||||
List A/B, occupations known (list A) or suspected (list B) to be associated with lung cancer; SD, standard deviation.
1
Subjects with previous employment in occupations categorized in list A and B were assigned to list A.