Table 3

Mean (SD) age and mean (95% CI) lung function in subgroups according to duration of agricultural employment

0 years1–10 years⩾10 years
Men/women75/10012/1 8/9
Mean (SD) age (years)46 (18)42 (18)62 (16)
FEV1 (% predicted)89 (95% CI 85 to 93)** 87 (95% CI 73 to 101)3-150 59 (95% CI 43 to 76)
VC (% predicted)90 (95% CI 87 to 93)** 90 (95% CI 78 to 102)3-150 70 (95% CI 60 to 81)
  • 3-150 p<0.05; **p<0.01compared with the ⩾10 year employment duration subgroup, covariance analysis with age correction.9