Table 2

Distribution of predictor variables entering ordinary least squares regression models*

Predictor variableMinimumMaximumMeanCoefficient 
 of variation†
*Sample size: 76.
†Coefficient of variation is defined as [standard deviation divided by the mean] × 100.
HAZ, health action zone; NHS, National Health Service; PCGs/PCTs, primary care groups/trusts.
Area characteristics
Whether an HAZ010.39124.7
Index of multiple deprivation7.958.027.840.0
Number adult smokers 16+ in health authority (millions)0.0330.2260.11537.3
% population aged 30–4423.935.327.87.8
Service characteristics
Number of months before service expected to work at full capacity0152.26147.0
Service operating at full capacity now010.6179.5
Coordinator has responsibilities other than developing/running service010.5687.0
Salary level of coordinator121.5332.4
Difficulty recruiting smoking cessation service advisors or counsellors152.7836.3
Difficulty finding good quality training courses for advisors or counsellors152.4647.6
Central base used (almost) exclusively by smoking cessation service010.11280.9
Satellite/outreach bases shared between service and other organisations010.8147.9
General practices sometimes used by advisors to deliver cessation interventions010.8934.7
Other NHS primary care premises used (other than general practices, pharmacies)010.6868.5
Percentage of users receiving individual support010046.567.2
Length (minutes) of individual sessions126027.936.2
Number of individual sessions in a complete treatment course285.329.0
% users receiving group support010055.056.5
Number of different types of professionals receiving training from service staff075.430.1
Protocol for dispensing or prescribing bupropion agreed with local GPs010.8246.1
Whether advisors/counsellors ever recommended bupropion010.8146.4
Strength of relationship of services with local PCGs/PCTs-4-1-2.1939.2