Table 2 Associations of baseline kidney function indexes with all-cause mortality among participants

eGFR (ml/min/1.73m²)

Q1 (< 70.62)

1733/31,420

ref

ref

ref

Q2 (70.62~)

1054/34,745

0.66 (0.61–0.71)

0.67 (0.62–0.73)

0.69 (0.64–0.75)

Q3 (84.67~)

865/35,587

0.61 (0.56–0.67)

0.62 (0.57–0.67)

0.64 (0.59–0.70)

Q4 (93.07~)

476/37,173

0.51 (0.46–0.57)

0.52 (0.46–0.58)

0.53 (0.47–0.59)

Q5 (≥ 100.34)

300/37,660

0.65 (0.56–0.75)

0.65 (0.56–0.75)

0.67 (0.58–0.77)

P-trend

< 0.001

< 0.001

< 0.001

Urea (mmol/L)

Q1 (< 4.70)

834/38,695

ref

ref

ref

Q2 (4.70~)

774/37,473

0.88 (0.80–0.98)

0.89 (0.81–0.98)

0.87 (0.79–0.96)

Q3 (5.50~)

689/32,647

0.88 (0.80–0.98)

0.89 (0.81–0.99)

0.89 (0.81–0.98)

Q4 (6.20~)

876/36,109

0.93 (0.84–1.02)

0.95 (0.86–1.04)

0.91 (0.83–1.01)

Q5 (≥ 7.30)

1255/31,662

1.35 (1.24–1.48)

1.36 (1.24–1.48)

1.27 (1.16–1.39)

P-trend

< 0.001

< 0.001

< 0.001

Uric acid (µmol/L)

Q1 (< 242.00)

739/36,151

ref

ref

ref

Q2 (242.00~)

727/36,694

0.81 (0.73–0.90)

0.82 (0.74–0.91)

0.83 (0.75–0.92)

Q3 (284.00~)

786/35,427

0.83 (0.75–0.91)

0.85 (0.77–0.95)

0.88 (0.79–0.97)

Q4 (325.00~)

923/35,049

0.88 (0.79–0.97)

0.91 (0.83–1.01)

0.93 (0.84–1.03)

Q5 (≥ 379.00)

1253/33,264

1.11 (1.01–1.22)

1.17 (1.07–1.29)

1.21 (1.10–1.34)

P-trend

< 0.001

< 0.001

< 0.001