Table 2

PRs and 95% CIs of COPD risk spirometry defined as FEV1/FVC<LLN for exposure to current job codified as four-digit SOC code 2000 in the UK Biobank study (n=228 614)

SOC codeOccupationsHealthy exposedCases exposedPR95% CI
8217Seafarers; barge, lighter and boat operatives32102.641.594.38
8122Coal mine operatives1352.301.005.31
9132Industrial cleaning process occupations34101.961.163.31
5313Roofers, roof tilers and slaters102221.861.292.67
9134Packers, bottlers, canners, fillers153301.601.152.22
5112Horticultural trades84141.550.972.50
8111Food, drink and tobacco process operatives296451.461.111.93
9233Cleaners, domestics17153021.431.281.59
5322Floorers and wall tilers160271.411.002.00
8114Chemical and related process operatives218291.390.981.97
9211Postal workers, mail sorters, messengers, couriers9621371.351.151.59
9121Labourers in building and woodworking trades376591.321.041.68
9244School mid-day assistants363521.321.011.74
9223Kitchen and catering assistants8651271.301.101.53
  • PRs and 95% CIs for exposure to each four-digit SOC code and COPD risk (defined as FEV1/FVC<LLN) were calculated by using a Poisson model with robust variance adjusted for sex, study centre (22 categories), age (5 years categories) and lifetime smoking exposure (ever, pack-years and years since quitting). Reference category: current workers not employed in the specific four-digit SOC-coded job tested. Healthy=non-COPD cases.

  • COPPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; LLN, lower limit of normal; PR, prevalence ratio; SOC, Standard Occupational Classification.