Regression modelling for cervical screening coverage among women aged 25–49 years
| Model | Univariate | Population | General practice | Population and general practice | |||||
|---|---|---|---|---|---|---|---|---|---|
| Deviance explained by model | – | 78.2% | 46.4% | 79.1% | |||||
| OR (95% CI) | p Value (Wald, χ2) | Deviance explained, % | OR (95% CI) | p Value (Wald, χ2) | OR (95% CI) | p Value (Wald, χ2) | OR (95% CI) | p Value (Wald, χ2) | |
| Population factors | |||||||||
| Urbanisation, % | 0.993 (0.992 to 0.995) | <0.001 | 41.9 | 0.999 (0.998 to 1.000) | 0.03 | – | 0.999 (0.998 to 1.000) | 0.3 | |
| London SHA (Q36) | 0.696 (0.653 to 0.741) | <0.001 | 46.2 | 1.011 (0.939 to 1.088) | NS (0.8) | – | – | ||
| Deprivation, % | 0.977 (0.973 to 0.981) | <0.001 | 41.1 | 0.987 (0.981 to 0.993) | <0.001 | – | 0.989 (0.981 to 0.996) | 0.004* | |
| Asian, black or mixed ethnicity, % | 0.989 (0.988 to 0.990) | <0.001 | 63.3 | 0.997 (0.995 to 0.999) | 0.005 | – | 0.997 (0.995 to 0.999) | 0.005 | |
| ‘Other’ ethnicity, % | 0.901 (0.889 to 0.912) | <0.001 | 62.4 | 0.958 (0.941 to 0.975) | <0.001 | _ | 0.963 (0.946 to 0.980) | <0.001 | |
| No higher education, % | 1.012 (1.005 to 1.020) | 0.001 | 7.3 | 1.011 (1.004 to 1.017) | 0.001 | – | 1.011 (1.004 to 1.018) | 0.003 | |
| General practice factors | |||||||||
| Average practice list size | 1.00 008 (1.00 005 to 1.00 010) | <0.001 | 23.3 | – | 0.99 999 (0.99 996 to 1.00 002) | NS (0.6) | – | ||
| Single-handed practices, % | 0.990 (0.987 to 0.993) | <0.001 | 20.6 | – | 0.990 (0.985 to 0.995) | <0.001 | 0.998 (0.996 to 1.000) | 0.1 | |
| Practitioners headcount per 105 population | 0.993 (0.989 to 0.997) | =0.001 | 6.5 | – | 0.989 (0.985 to 0.992) | <0.001 | 0.9993 (0.9963 to 1.0022) | 0.6 | |
| Practice staff FTE | 1.0003 (1.0002 to 1.0004) | <0.001 | 22.8 | – | 1.0002 (1.0001 to 1.0003) | <0.001 | 1.00 005 (0.99 999 to 1.00 011) | 0.06 | |
| Practitioners qualified outside UK, % | 0.994 (0.992 to 0.997) | <0.001 | 13.7 | – | 0.998 (0.996 to 1.001) | NS (0.2) | – | ||
*The variance of the coefficient estimate is being inflated by multicollinearity with other factors (GVIF=2.7).
FTE, full-time equivalent; NS, considered non-significant (see Methods section for details); SHA, strategic health authority.