Table 2.
Results of fitting binomial regression models (model 1) and a Poisson regression model (model 2) to the outcome variables
| Model | Outcome variables | IMD | Random effect for GP practice | ||
|---|---|---|---|---|---|
| Regression estimate, β (95% CI) | P value | Variance | Likelihood ratio, P value | ||
| Model 1i | Specimens to laboratory per 1000 practice population, 2011 | 0·849 (−7·410 to 9·108) | 0·840 | 0·319 | <0·001 |
| Model 1ii | Positive specimens per 1000 specimens, 2011 | 11·367 (−4·221 to 26·955) | 0·153 | 0·000 | 0·500 |
| Model 1iii | Positive specimens per 1000 practice population, 2011 | 11·296 (−4·089 to 26·680) | 0·150 | 0·000 | 0·500 |
| Model 2 | Positive specimens per 1000 practice population, 2003–2011 | −3·480 (−14·885 to 7·926) | 0·550 | 0·294 | <0·001 |
IMD, Index of multiple deprivation; CI, confidence interval.