Age group (years)

Serum examined

Impaired (eGFR

< 60 mL/min/1.73m²) (%)

Not impaired (eGFR > 60 mL/min/1.73m²) (%)

40 - 49

60

6 (10)

54 (90)

50 - 59

77

12 (15.6)

65 (71.4)

60 - 69

110

37 (33.6)

73 (66.4)

70 - 79

94

41 (43.6)

53 (56.4)

80 - 89

22

17 (77.3)

5 (22.7)

90 - 99

5

4 (80)

1 (20)

Total

368

117 (31.8)

251 (68.2)