Table 4.

Laboratory markers examined at medical encounters（N = 50 091 persons）

Item	Frequencya （for persons with eGFR <45 mL/min/1.73 m2)b
SCr	59.1% (85.7%)
Cystatin C	2.0% (6.8%)
Albumin:creatinine ratio	5.3% (4.4%)
Urine protein:creatinine ratio	5.1% (15.5%)
Semiqualitative urine dipstick	34.0% (45.6%)
Urinary sedimentation	15.1% (29.7%)
Any of the above	64.6% (87.4%)

^aWithin 180 days post-checkup.

^bn = 3541 persons.