Multiple linear regression results for under 75 years SMR for practices in England (n=7856)
| Variable | β-Coefficient | 95% CI | p Value |
|---|---|---|---|
| Population characteristics | |||
| IMD 2010 | 1.81 | (1.69 to 1.94) | <0.001 |
| Proportion of the practice population who are white (%) | 0.17 | (0.10 to 0.25) | <0.001 |
| Proportion of those with chronic conditions who are smokers (%) | 0.49 | (0.39 to 0.64) | <0.001 |
| Proportion of the practice population who are on the practice's diabetes register (%) | 1.30 | (0.50 to 2.11) | 0.002 |
| Efficiency | |||
| Registered list size | 0.00002 | (−0.00008 to 0.0001) | 0.739 |
| Supply | |||
| Number of GPs per 1000 patients | −4.31 | (−6.80 to −1.82) | <0.001 |
| Access | |||
| Proportion of patients reporting being able to get an appointment within 48 h (%) | −0.06 | (−0.11 to −0.02) | 0.006 |
| Continuity of care and quality of relationship | |||
| Proportion of patients reporting being able to get an appointment in advance (%) | −0.01 | (−0.04 to 0.01) | 0.283 |
| Proportion of patients expressing trust in their GP (%) | 0.03 | (−0.10 to 0.16) | 0.635 |
| Prevention | |||
| DM18 The percentage of patients with diabetes who have had influenza immunisation in the preceding 1 September to 31 March (%) | 0.007 | (−0.06 to 0.08) | 0.849 |
| SM04 The percentage of patients with any or any combination of 10 specified conditions who smoke, and whose notes contain a record that smoking cessation advice or referral to a specialist service, where available, has been offered within the previous 15 months | −0.02 | (−0.08 to 0.04) | 0.587 |
| Detection | |||
| AF04 The percentage of patients with atrial fibrillation diagnosed after 1 April 2008 with ECG or specialist confirmed diagnosis | −0.002 | (−0.032 to 0.029) | 0.918 |
| Proportion of practice population on the QOF hypertension register (%) | −0.77 | (−0.98 to −0.56) | <0.001 |
| Clinical management | |||
| BP05 The percentage of patients with hypertension in whom the last blood pressure (measured in the previous nine months) is 150/90 or less | −0.077 | (−0.15 to −0.004) | 0.04 |
| CHD10 The percentage of patients with coronary heart disease who are currently treated with a β-blocker (unless a contraindication or side effects are recorded) | 0.088 | (0.018 to 0.16) | 0.015 |
| DM23 The percentage of patients with diabetes in whom the last HbA1c level is 7 or less (or equivalent test/reference range depending on local laboratory) in the previous 15 months | 0.06 | (−0.003 to 0.13) | 0.061 |
| CKD03 The percentage of patients on the CKD register in whom the last blood pressure reading, measured in the previous 15 months, is 140/85 or less | 0.0390 | (−0.0097 to 0.0877) | 0.116 |
Statistical model: multiple linear regression of premature SMR with robust errors to account for clustering. No formal adjustment for multiplicity.
CKD, chronic kidney disease; DM, diabetes mellitus; GPs, general practitioners; HbA1c, glycated haemoglobin; SMR, standardised mortality ratios.