Table 1 Distribution of inconsistent Crea and Cys C results across sex and age groups based on old and updated ris.

From: Updated reference intervals for serum cystatin C and creatinine based on age and sex variations

Groups

Sex

Crea > URI (%)

Cys C > URI (%)

Crea or Cys C > URI (%)

Both > URI (%)

Old non-partitioned by age and sex RIs

20–60 (n = 14102)

F (n = 9859)

112 (1.14%)

44 (0.45%)

148 (1.5%)

8 (5.4%)

M (n = 4243)

82 (1.93%)

106 (2.50%)

173(4.08%)

15 (8.7%)

> 60 (n = 866)

F (n = 467)

2 (0.43%)

35 (7.50%)

37 (7.92%)

0

M (n = 399)

2 (0.50%)

79 (19.8%)

81 (20.30%)

0

Updated age- and sex-partitioned RIs

≤ 18

F (n = 25)

0

0

0

0

M (n = 6)

0

0

0

0

18 < age ≤ 30

F (n = 2778)

94 (3.4%)

64 (2.3%)

143 (5.1%)

15 (10.5%)

M (n = 1041)

40 (3.8%)

33 (3.2%)

66 (6.3%)

7 (10.6%)

30 < age ≤ 40

F (n = 3447)

102 (3.0%)

122 (3.5%)

205 (5.9%)

19 (9.3%)

M (n = 1424)

95 (6.7%)

78 (5.5%)

163 (11.4%)

10 (6.1%)

40 < age ≤ 50

F (n = 2222)

77 (3.5%)

72 (3.2%)

135 (6.1%)

14 (10.4%)

M (n = 958)

33 (3.4%)

27 (2.8%)

55 (5.7%)

5 (9.1%)

50 < age ≤ 60

F (n = 1387)

59 (4.3%)

54 (3.9%)

97 (7.0%)

16 (16.5%)

M (n = 814)

32 (3.9%)

30 (3.7%)

53 (6.5%)

9 (17.0%)

60 < age ≤ 70

F (n = 372)

6 (1.6%)

8 (2.2%)

14 (3.8%)

0

M (n = 305)

7 (2.3%)

11 (3.6%)

16 (5.2%)

2 (12.5%)

≥ 71

F (n = 95)

0

0

0

0

M (n = 94)

6 (6.4%)

4 (4.3%)

8 (8.5%)

2 (25%)

  1. Note: The percentage in the last column represents the ratio of individuals with abnormal results for both markers to the number of individuals with abnormal results for either marker (Column 5th).