Table 3

 Comparison of smokers and non-smokers with asthma: all other outcome measures (evening PEF, puffs of reliever inhaler, asthma control questionnaire score, FEV1 pre-salbutamol)

Mean (SD) changeAdjusted p value
SmokersNon-smokersAdjusted difference(95% CI)
*n varies because of non-attenders/missing data at visits.
12 weeksn* = 36n = 53
Δ Evening PEF (l/min)−3 (36)11 (32)−14 (−31 to 3)[unadjusted−13(−28 to 1)]0.09[unadjusted 0.07]
n = 29n = 37
Δ puffs per day of reliever inhaler0 (2)0 (2)1 (0 to 2)[unadjusted 0 (−0.5 to 1)]0.08[unadjusted 0.39]
n = 34n = 53
Δ questionnaire score0 (1)0 (1)1 (0 to1)[unadjusted 0 (−0.3 to 0.3)]0.0130[(unadjusted 0.80]
n = 35n = 53
Δ FEV1 pre-salbutamol0 (0)0 (0)−0.08 (−0.2 to 0.06)[unadjusted 0 (−0.2 to 0.03)]0.26[unadjusted 0.14]