Table 2

Number of practices by diagnostic process or outcome indicator, median (IQR) activity, indicator reliability for practice activity at the median (50th), and the 25th and 75th centiles of the distribution and years required for reliability of 0.7 and 0.9

IndicatorNumber of practices includedMedian/IQR cases/events per practiceMedian/IQR practice indicatorsMedian (IQR) Spearman-Brown reliabilityYears required for reliability 0.7Years required for reliability 0.9
50% of practices90% of practices50% of practices90% of practices
Diagnostic process indicators
 Breast screening coverage7951502 (258–862)71.3 (63.9–76.3)%0.96 (0.93–0.97)0.10.30.41.0
 Cervical screening coverage79101122 (644–1744)74.9 (70.3–78.5)%0.97 (0.95–0.98)0.10.20.30.8
 Bowel screening coverage7924349 (166–632)57.0 (48.6–62.7)%0.96 (0.93–0.97)0.10.30.41.2
 Sigmoidoscopy rate795424.5 (13–44)4.1 (2.8–5.6)Per 1000 person-years0.86 (0.76–0.91)0.41.21.54.8
 Colonoscopy rate795439 (20–65)6.4 (4.7–8.4)Per 1000 person-years0.87 (0.79–0.92)0.31.11.34.1
 Upper gastrointestinal endoscopy rate795466 (35–110)10.8 (8.3–13.8)Per 1000 person-years0.91 (0.84–0.94)0.20.70.92.7
 TWW referral rate7954124 (60–219)20.0 (14.2–26.4)Per 1000 person-years0.97 (0.93–0.98)0.10.30.31.2
 TWW referral rate (colorectal)795421 (9–38)3.4 (2.0–4.8)Per 1000 person-years0.88 (0.77–0.93)0.31.41.35.6
 TWW referral rate (lung)79545 (2–9)0.8 (0.4–1.2)Per 1000 person-years0.60 (0.45–0.72)1.64.86.118.3
 TWW referral rate (skin)795420 (8–37)3.2 (1.8–4.8)Per 1000 person-years0.90 (0.80–0.94)0.31.21.04.7
 TWW referral rate (breast)795422 (11–39)3.7 (2.5–4.9)Per 1000 person-years0.81 (0.68–0.88)0.62.02.27.7
Diagnostic outcome indicators
 TWW conversion rate795412 (6–22)9.9 (7.2–13.0)%0.54 (0.37–0.67)2.07.67.629.2
 TWW detection rate36794112 (6–22)47.1 (38.2–55.6)%0.32 (0.19–0.45)5.016.819.364.6
 Emergency route to diagnosis76876 (3–11)23.4 (17.2–30.8)%0.24 (0.14–0.33)7.624.629.194.7
 Referred route to diagnosis768713 (6–22)49.2 (40.0–56.3)%0.22 (0.13–0.32)8.228.131.5108.5
 Other route to diagnosis76877 (3–12)26.1 (19.1–33.9)%0.33 (0.21–0.45)4.815.618.660.2
Other indicators
 Cancer mortality795413 (7–23)2.3 (1.5–2.9)Per 1000 person-years0.70 (0.55–0.80)1.03.33.912.5
 Emergency cancer hospitalisations793528 (15–48)4.7 (3.4–6.0)Per 1000 person-years0.81 (0.70–0.88)0.51.72.16.6
 Incident cases794628 (15–48)4.8 (3.4–6.0)Per 1000 person-years0.80 (0.68–0.87)0.61.92.27.2
 Prevalent cases7960112 (55–192)1.9 (1.4–2.4)%0.96 (0.92–0.97)0.10.40.41.4
  • TWW, two-week wait.