Distribution of predictor variables entering ordinary least squares regression models*
| Predictor variable | Minimum | Maximum | Mean | Coefficient 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 HAZ | 0 | 1 | 0.39 | 124.7 |
| Index of multiple deprivation | 7.9 | 58.0 | 27.8 | 40.0 |
| Number adult smokers 16+ in health authority (millions) | 0.033 | 0.226 | 0.115 | 37.3 |
| % population aged 30–44 | 23.9 | 35.3 | 27.8 | 7.8 |
| Service characteristics | ||||
| Number of months before service expected to work at full capacity | 0 | 15 | 2.26 | 147.0 |
| Service operating at full capacity now | 0 | 1 | 0.61 | 79.5 |
| Coordinator has responsibilities other than developing/running service | 0 | 1 | 0.56 | 87.0 |
| Salary level of coordinator | 1 | 2 | 1.53 | 32.4 |
| Difficulty recruiting smoking cessation service advisors or counsellors | 1 | 5 | 2.78 | 36.3 |
| Difficulty finding good quality training courses for advisors or counsellors | 1 | 5 | 2.46 | 47.6 |
| Central base used (almost) exclusively by smoking cessation service | 0 | 1 | 0.11 | 280.9 |
| Satellite/outreach bases shared between service and other organisations | 0 | 1 | 0.81 | 47.9 |
| General practices sometimes used by advisors to deliver cessation interventions | 0 | 1 | 0.89 | 34.7 |
| Other NHS primary care premises used (other than general practices, pharmacies) | 0 | 1 | 0.68 | 68.5 |
| Percentage of users receiving individual support | 0 | 100 | 46.5 | 67.2 |
| Length (minutes) of individual sessions | 12 | 60 | 27.9 | 36.2 |
| Number of individual sessions in a complete treatment course | 2 | 8 | 5.3 | 29.0 |
| % users receiving group support | 0 | 100 | 55.0 | 56.5 |
| Number of different types of professionals receiving training from service staff | 0 | 7 | 5.4 | 30.1 |
| Protocol for dispensing or prescribing bupropion agreed with local GPs | 0 | 1 | 0.82 | 46.1 |
| Whether advisors/counsellors ever recommended bupropion | 0 | 1 | 0.81 | 46.4 |
| Strength of relationship of services with local PCGs/PCTs | -4 | -1 | -2.19 | 39.2 |