Table 2.

Quality of life among respondents with asthma in post intervention survey, based on number of patients with quality of life information

Variable	Mean quality of life (95% CI)	Mean square root quality of life (95% CI)	No (%) of patients with quality of life score ⩾5
Control practices (n=903)	2.68 (2.52 to 2.84)	1.50 (1.46 to 1.54)	116 (12.9)
Intervention practices (n=659)	2.64 (2.51 to 2.78)	1.52 (1.47 to 1.56)	95 (14.4)
Difference in mean square root quality of life (95% CI)*		−0.0095 (0.105 to 0.086), P=0.85
Difference in mean square root quality of life for patients taking asthma drugs (95% CI)*		−0.009 (−0.110 to 0.129), P=0.88
Odds ratio (95% CI) comparing intervention and control practices†			1.07 (0.76 to 1.52), P=0.68

^*Allowing for clustering by practice using random effects model. 

^†Allowing for clustering by practice using generalised estimating equations.