Table 2

  Characteristics of participants by cancer type in study of exposure work strain and risk of cancer. Figures are numbers (percentage) of participants unless stated otherwise

CharacteristicsCancer freeIncident cancer
Any cancerColorectal cancerLung cancerBreast cancerProstate cancer
Participants*110 2915 7655223741010865
Job strain17 763 (16.1)843 (14.6)78 (14.9)64 (17.1)181 (17.9)79 (9.1)
Female59 695 (54.1)2 588 (44.9)188 (36.0)109 (29.1)1 010 (100.0)0 (0)
Mean (SD; range) age at baseline (years)38.5 (10.3; 17-70)48.9 (8.2; 19-67)49.9 (7.8; 26-64)51.6 (6.8; 29-65)49.1 (6.0; 21-68)53.2 (5.5; 28-67)
Low socioeconomic position at baseline34 644 (31.4)1778 (30.8)151 823182 (48.7)297 (29.49194 (22.49
Mean (SD) BMI at baseline24.8 (3.9)25.0 (3.8)24.9 (28.9)24.3 (3.8)24.1 83.5)26.7 (3.9)
Normal weight in POLS†5294 (61.7)140 (51.7)21 (47.7)11(50.0)17 (58.6)
Smokers at baseline26 486 (24.0)1562 (27.1)122 (23.4)251 (67.1)224 (22.2)159 (18.4)
Drinkers at baseline‡§11 089 (10.1)655 (11.4)71 (13.6)56 (15.0)73 (7.2)120 (13.9)

*Participants with complete data on job strain, age, sex, socioeconomic position, BMI (not available in Still Working and COPSOQ-I), smoking, alcohol intake, and incident cancer events.

†BMI recorded as categorical in POLS.39

‡Drinkers here defined as participants who consume more than recommended amounts of alcohol: ≥15 units/week for women; ≥22 units/week for men.

§Approximated for participants in Still Working as we were unable to ascertain number of drinks per time period because of way alcohol intake was determined in baseline questionnaire.