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
| Indicator | Number of practices included | Median/IQR cases/events per practice | Median/IQR practice indicators | Median (IQR) Spearman-Brown reliability | Years required for reliability 0.7 | Years required for reliability 0.9 | |||
| 50% of practices | 90% of practices | 50% of practices | 90% of practices | ||||||
| Diagnostic process indicators | |||||||||
| Breast screening coverage | 7951 | 502 (258–862) | 71.3 (63.9–76.3) | % | 0.96 (0.93–0.97) | 0.1 | 0.3 | 0.4 | 1.0 |
| Cervical screening coverage | 7910 | 1122 (644–1744) | 74.9 (70.3–78.5) | % | 0.97 (0.95–0.98) | 0.1 | 0.2 | 0.3 | 0.8 |
| Bowel screening coverage | 7924 | 349 (166–632) | 57.0 (48.6–62.7) | % | 0.96 (0.93–0.97) | 0.1 | 0.3 | 0.4 | 1.2 |
| Sigmoidoscopy rate | 7954 | 24.5 (13–44) | 4.1 (2.8–5.6) | Per 1000 person-years | 0.86 (0.76–0.91) | 0.4 | 1.2 | 1.5 | 4.8 |
| Colonoscopy rate | 7954 | 39 (20–65) | 6.4 (4.7–8.4) | Per 1000 person-years | 0.87 (0.79–0.92) | 0.3 | 1.1 | 1.3 | 4.1 |
| Upper gastrointestinal endoscopy rate | 7954 | 66 (35–110) | 10.8 (8.3–13.8) | Per 1000 person-years | 0.91 (0.84–0.94) | 0.2 | 0.7 | 0.9 | 2.7 |
| TWW referral rate | 7954 | 124 (60–219) | 20.0 (14.2–26.4) | Per 1000 person-years | 0.97 (0.93–0.98) | 0.1 | 0.3 | 0.3 | 1.2 |
| TWW referral rate (colorectal) | 7954 | 21 (9–38) | 3.4 (2.0–4.8) | Per 1000 person-years | 0.88 (0.77–0.93) | 0.3 | 1.4 | 1.3 | 5.6 |
| TWW referral rate (lung) | 7954 | 5 (2–9) | 0.8 (0.4–1.2) | Per 1000 person-years | 0.60 (0.45–0.72) | 1.6 | 4.8 | 6.1 | 18.3 |
| TWW referral rate (skin) | 7954 | 20 (8–37) | 3.2 (1.8–4.8) | Per 1000 person-years | 0.90 (0.80–0.94) | 0.3 | 1.2 | 1.0 | 4.7 |
| TWW referral rate (breast) | 7954 | 22 (11–39) | 3.7 (2.5–4.9) | Per 1000 person-years | 0.81 (0.68–0.88) | 0.6 | 2.0 | 2.2 | 7.7 |
| Diagnostic outcome indicators | |||||||||
| TWW conversion rate | 7954 | 12 (6–22) | 9.9 (7.2–13.0) | % | 0.54 (0.37–0.67) | 2.0 | 7.6 | 7.6 | 29.2 |
| TWW detection rate36 | 7941 | 12 (6–22) | 47.1 (38.2–55.6) | % | 0.32 (0.19–0.45) | 5.0 | 16.8 | 19.3 | 64.6 |
| Emergency route to diagnosis | 7687 | 6 (3–11) | 23.4 (17.2–30.8) | % | 0.24 (0.14–0.33) | 7.6 | 24.6 | 29.1 | 94.7 |
| Referred route to diagnosis | 7687 | 13 (6–22) | 49.2 (40.0–56.3) | % | 0.22 (0.13–0.32) | 8.2 | 28.1 | 31.5 | 108.5 |
| Other route to diagnosis | 7687 | 7 (3–12) | 26.1 (19.1–33.9) | % | 0.33 (0.21–0.45) | 4.8 | 15.6 | 18.6 | 60.2 |
| Other indicators | |||||||||
| Cancer mortality | 7954 | 13 (7–23) | 2.3 (1.5–2.9) | Per 1000 person-years | 0.70 (0.55–0.80) | 1.0 | 3.3 | 3.9 | 12.5 |
| Emergency cancer hospitalisations | 7935 | 28 (15–48) | 4.7 (3.4–6.0) | Per 1000 person-years | 0.81 (0.70–0.88) | 0.5 | 1.7 | 2.1 | 6.6 |
| Incident cases | 7946 | 28 (15–48) | 4.8 (3.4–6.0) | Per 1000 person-years | 0.80 (0.68–0.87) | 0.6 | 1.9 | 2.2 | 7.2 |
| Prevalent cases | 7960 | 112 (55–192) | 1.9 (1.4–2.4) | % | 0.96 (0.92–0.97) | 0.1 | 0.4 | 0.4 | 1.4 |
TWW, two-week wait.