Table 1.

Descriptive statistics

Variable2013–20142014–20152015–20162016–2017
Normally distributed
Mean (SD); % missing
Mean (SD); % missingMean (SD); % missingMean (SD); % missing
% Practice list aged ≥75 years (PHE)7.62 (3.14); 0.007.68 (3.18); 0.007.69 (3.20); 0.007.68 (3.23); 1.76
% Self-reported smokers (GPPS Q59)17.74 (6.85); 0.2216.96 (6.83); 0.2716.97 (6.53); 0.0816.14 (6.54); 1.38
% Practice list on hypertension register13.96 (3.59); 1.3114.04 (3.59); 1.3114.06 (3.59); 1.3114.06 (3.75); 3.43
% Practice list on diabetes register6.47 (1.84); 1.316.65 (1.90); 1.386.84 (1.96); 1.316.95 (2.08); 3.43
% Practice list on CHD register3.32 (1.14); 1.313.28 (1.13); 1.393.23 (1.12); 1.313.19 (1.13); 3.43
% Practice list on stroke register1.69 (0.65); 1.311.71 (0.65); 1.401.72 (0.66); 1.311.73 (0.68); 3.43
Skewed distributionMedian (IQR); % missingMedian (IQR); % missingMedian (IQR); % missingMedian (IQR); % missing
Total payments per patient (£) (NHS Digital)102.77 (92.31–118.81); 0.00106.09 (96.69–122.47); 0.00107.71 (97.69–123.10); 0.00115.43 (103.48–132.35); 0.00
List size (QOF)6509 (3991–9825); 0.006618 (4076–9924); 0.006721 (4182–10 095); 0.006947 (4317–10 354); 0.00
% Black ethnicity (GPPS Q52)
0.69 (0–3.71); 4.04
0 (0–3.13); 4.220, (0–3.38); 4.230.64 (0–3.51); 2.11
% South Asian ethnicity (GPPS Q52)1.09 (0–4.90); 3.471.10 (0–4.94); 3.661.32 (0–5.73); 2.261.35 (0–5.64); 3.69
% Permanently sick or disabled (GPPS Q53)4.00 (2.22–6.44); 0.733.86 (2.13–6.33); 0.783.78 (2.02–6.09); 0.323.69 (2.01–6.02); 1.70
Categorical valuesNumbers (%)Numbers (%)Numbers (%)Numbers (%)
Contract type:GMS4141 (55.97)GMS 4205 (56.83)GMS 4692 (63.41)GMS 5175 (71.73)
PMS3198 (43.22)PMS 3005 (40.61)PMS 2515 (33.99)PMS 2029 (28.12)
APMS60 (0.81)APMS 189 (2.55)APMS 192 (2.59)APMS 10 (0.14)
IMD scores by contract typeMean (SD)Mean (SD)Mean (SD)Mean (SD)
GMS22.59 (11.67)22.54 (11.61)22.88 (11.72)22.73 (11.76)
PMS24.50 (11.76)24.42 (11.72)24.12 (11.59)24.94 (11.49)
APMS35.26 (11.48)31.56 (13.09)31.49 (13.19)30.35 (12.51)
  • APMS = Alternative Provider Medical Services. CHD = coronary heart disease. GMS = General Medical Services. GPPS = GP Patient Survey. IMD = Index of Multiple Deprivation. IQR = interquartile range. PHE = Public Health England. PMS = Personal Medical Services. QOF = Quality and Outcomes Framework. SD = standard deviation.