From: A prospective study of decline in lung function in relation to welding emissions
N | Predicted FEV1in 1987 | Predicted FEV1in 2005 | Change in predicted values, mean (95% CL) | Difference in decline [welders – referents, (95% CL)] | |
---|---|---|---|---|---|
Smokers | |||||
Welders | 32 | 104 % | 96 % | -8.1 (-12.6 to -3.6) | 3.8 (-4.4 to +12.4) |
Non welders | 121 | 107 % | 103 % | -4.3 (-11.7 to +3.0) | Reference |
Non-smokers | |||||
Welders | 36 | 109 % | 109 % | -0.1 (-3.4 to +3.3) | 1.6 (-5.1 to +8.4) |
Non welders | 121 | 105 % | 107 % | -1.6 (4.3 to +7.4) | Reference |
All | |||||
Welders | 68 | 107 % | 103 % | -3.02 % (-5.5 to -0.5) | 1.5 (-3.6 to +6.5) |
Non-welders | 241 | 106 % | 105 % | -1.52 % (-6.0 to +2.8) | Reference |