Table 4

Multivariate hazards RRs (95% CIs) of prognostic factors for the occurrence of sickness absence due to respiratory disorders

Cause of sickness absence and factor Subjects RR (95% CI) p Value
Asthma:
 Age (y):
  ⩽40  1251.00
  >40  1260.65(0.35 to 1.22)0.18
 FVC:
  >80% Of reference FVC 2281.00
  ⩽80% Of reference FVC 104.03(1.41 to 11.54)0.009
 Asthma complaints before study:
  No  2191.00
  Yes  323.96(1.99 to 7.90)0.000
Chronic obstructive pulmonary disease:
 Age (y):
  ⩽401251.00
  >401260.78(0.49 to 1.25)0.31
  Office workers291.00
  v Metal workers1252.77(0.99 to 7.75)0.05
  v Welders972.73(0.95 to 7.79)0.06
Chronic non-specific lung disease:
 Age (y):
  ⩽401251.00
  >401260.69(0.44 to 1.08)0.1
 FVC:
  >80% Of reference FVC2281.00
  ⩽80% Of reference FVC102.49(1.07 to 5.79)0.034
 Office workers291.00
v Metal workers 1252.91(1.04 to 8.13)0.04
v Welders973.52(1.24 to 9.97)0.018