Table 3 Multivariate results by Cox regression (N = 2387)

Admission albumin

0.92 (0.90, 0.94) < 0.0001

0.93 (0.91, 0.95) < 0.0001

0.94 (0.92, 0.96) < 0.0001

Age Stratified Analysis

65 ≤ age<75

0.91 (0.88, 0.95) < 0.0001

0.92 (0.88, 0.96) 0.0002

0.95 (0.91, 1.01) 0.0893

75 ≤ age<85

0.91 (0.89, 0.93) < 0.0001

0.92 (0.90, 0.95) < 0.0001

0.94 (0.91, 0.97) 0.0001

age ≥ 85

0.93 (0.91, 0.96) < 0.0001

0.94 (0.91, 0.97) < 0.0001

0.94 (0.91, 0.98) 0.0010

Admission albumin tertiles

 Low group (< 35 g/L)

Ref

Ref

Ref

 Medium group (≥ 35 g/L, < 40 g/L)

0.56 (0.48, 0.66) < 0.0001

0.63 (0.54, 0.74) < 0.0001

0.71 (0.59, 0.86) 0.0003

 High group (≥ 40 g/L)

0.39 (0.32, 0.48) < 0.0001

0.52 (0.42, 0.64) < 0.0001

0.62 (0.49, 0.79) < 0.0001

P for trend

< 0.0001

< 0.0001

< 0.0001