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

CategoryPrimary careSecondary care
Sensitivity (%) (95% CI)Positive predictive value (%) (95% CI)Sensitivity (%) (95% CI)Positive predictive value (%) (95% CI)
All patients91 (91 to 92)78 (78 to 78)92 (92 to 92)65 (64 to 65)
Age (years)
18-3995 (94 to 96)77 (76 to 78)91 (90 to 92)67 (65 to 69)
40-4994 (93 to 95)81 (80 to 82)89 (88 to 90)68 (66 to 70)
50-5993 (92 to 94)83 (82 to 84)91 (90 to 92)71 (70 to 72)
60-6991 (90 to 92)80 (79 to 81)92 (91 to 93)65 (64 to 66)
70-7987 (86 to 88)74 (73 to 75)95 (94 to 96)59 (57 to 61)
 ≥8082 (80 to 84)63 (61 to 65)94 (93 to 95)56 (54 to 58)
Sex
Women92 (91 to 93)74 (73 to 75)93 (92 to 94)63 (62 to 64)
Men91 (91 to 91)80 (79 to 81)91 (91 to 91)66 (65 to 67)
Ethnic group
White91 (91 to 91)77 (76 to 78)92 (92 to 92)62 (61 to 63)
Mixed94 (91 to 97)79 (75 to 83)96 (94 to 98)69 (63 to 75)
South Asian90 (89 to 91)86 (85 to 87)95 (94 to 96)77 (75 to 79)
Black90 (88 to 92)86 (84 to 88)92 (90 to 94)77 (74 to 80)
Other92 (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)
290 (89 to 91)79 (78 to 80)93 (92 to 94)66 (65 to 67)
392 (91 to 93)78 (77 to 79)92 (91 to 93)63 (62 to 64)
493 (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.