Table 1.
Sensitivity and positive predictive value of primary and secondary care definitions (with UK Renal Registry cohort as gold standard) by personal characteristics, for prevalent kidney replacement therapy cohorts at the start of 2020
| Category | Primary care | Secondary care | ||
| Sensitivity (%) (95% CI) | Positive predictive value (%) (95% CI) | Sensitivity (%) (95% CI) | Positive predictive value (%) (95% CI) | |
| All patients | 91 (91 to 92) | 78 (78 to 78) | 92 (92 to 92) | 65 (64 to 65) |
| Age (years) | ||||
| 18-39 | 95 (94 to 96) | 77 (76 to 78) | 91 (90 to 92) | 67 (65 to 69) |
| 40-49 | 94 (93 to 95) | 81 (80 to 82) | 89 (88 to 90) | 68 (66 to 70) |
| 50-59 | 93 (92 to 94) | 83 (82 to 84) | 91 (90 to 92) | 71 (70 to 72) |
| 60-69 | 91 (90 to 92) | 80 (79 to 81) | 92 (91 to 93) | 65 (64 to 66) |
| 70-79 | 87 (86 to 88) | 74 (73 to 75) | 95 (94 to 96) | 59 (57 to 61) |
| ≥80 | 82 (80 to 84) | 63 (61 to 65) | 94 (93 to 95) | 56 (54 to 58) |
| Sex | ||||
| Women | 92 (91 to 93) | 74 (73 to 75) | 93 (92 to 94) | 63 (62 to 64) |
| Men | 91 (91 to 91) | 80 (79 to 81) | 91 (91 to 91) | 66 (65 to 67) |
| Ethnic group | ||||
| White | 91 (91 to 91) | 77 (76 to 78) | 92 (92 to 92) | 62 (61 to 63) |
| Mixed | 94 (91 to 97) | 79 (75 to 83) | 96 (94 to 98) | 69 (63 to 75) |
| South Asian | 90 (89 to 91) | 86 (85 to 87) | 95 (94 to 96) | 77 (75 to 79) |
| Black | 90 (88 to 92) | 86 (84 to 88) | 92 (90 to 94) | 77 (74 to 80) |
| Other | 92 (89 to 95) | 83 (79 to 87) | 89 (86 to 92) | 74 (69 to 79) |
| Index of multiple deprivation group | ||||
| 1 (most deprived) | 89 (88 to 90) | 78 (77 to 79) | 94 (93 to 95) | 66 (65 to 67) |
| 2 | 90 (89 to 91) | 79 (78 to 80) | 93 (92 to 94) | 66 (65 to 67) |
| 3 | 92 (91 to 93) | 78 (77 to 79) | 92 (91 to 93) | 63 (62 to 64) |
| 4 | 93 (92 to 94) | 76 (75 to 77) | 91 (90 to 92) | 63 (61 to 65) |
| 5 (least deprived) | 93 (92 to 94) | 77 (76 to 78) | 90 (89 to 91) | 64 (62 to 66) |
CI, confidence interval.