Group

Number of cases

Urine CYS-C

Blood CYS-C

t value

P value

Kidney injury group

150

1.04 ± 2.14

1.94 ± 2.36

3.4600

0.0003

Healthy control group

150

0.11 ± 0.05

0.83 ± 0.20

42.7744

0.0000

t value

—

5.3210

5.7399

—

—

P value

—

0.0000

0.0000

—

—