Table 2

Association between asthma and frequency of analgesic use

Cases N (%) Controls N (%) Crude OR (95% CI) OR (95% CI)2-150
Aspirin
 Never403  (61)537  (59)11
 <Monthly166 (25)254 (28)0.87 (0.69 to 1.10)1.04 (0.81 to 1.35)
 Monthly49 (7)66 (7)0.99 (0.67 to 1.46)0.97 (0.64 to 1.48)
 Weekly33 (5)39 (4)1.13 (0.70 to 1.82)1.01 (0.60 to 1.70)
 Daily13 (2)14 (2)1.24 (0.58 to 2.66)1.05 (0.47 to 2.35)
p (trend) = 0.917
Paracetamol
 Never98 (15)153 (17)11
 <Monthly259 (39)424 (47)0.95 (0.71 to 1.28)1.06 (0.77 to 1.45)
 Monthly172 (26)219 (24)1.23 (0.89 to 1.69)1.22 (0.87 to 1.72)
 Weekly105 (16)97 (11)1.69 (1.16 to 2.46)1.79 (1.21 to 2.65)
 Daily30 (5)17 (2)2.76 (1.44 to 5.26)2.38 (1.22 to 4.64)
p (trend) = 0.0002
  • 2-150 Controlling for other analgesic and factors listed in table1.