STOP— a training intervention to optimise treatment for smoking cessation in community pharmacies: cluster randomised controlled trial

Table 3 Analysis of primary outcome: treated smoker throughput in the STOP intervention and control pharmacies

Trial arm [number of pharmacies]	Total throughput	Throughput per pharmacy [mean and (sd)]	Incidence rate ratio^c [95% confidence interval]	p-value
Control (30)^a	641	21.37 (20.04)	Ref
Intervention (30)^b	631	21.03 (23.30)	0.75 (0.46 to 1.23)	0.259

Intra-cluster correlation coefficient = 0.026 (95% CI 0.001 to 0.052)
^aOne (from Coventry) of 30 pharmacies did not enrol any smokers to the NHS SSP
^bSix (3 from Coventry, 1 from London and 3 from Wales) of 30 pharmacies did not enrol any smokers to the NHS SSP. Of these 6, 1 had withdrawn from the STOP Trial
^cAdjusted for site and number of prescriptions/forms per month category. Number of prescriptions/forms per pharmacy over the 11 months of the trial (identified by the trial start and end dates for each pharmacy) was included as the offset

ISSN: 1741-7015