Table 3 The association between the direction of delta serum phosphate and in-hospital mortality and 28-day mortality

≤−3.2

In-hospital mortality

1.67 (1.08–2.60), 0.022

1.80 (1.16–2.82), 0.009

1.40 (0.86–2.30), 0.175

28-day mortality

1.70 (1.13–2.58), 0.011

1.87 (1.24–2.85), 0.003

1.49 (0.94–2.38), 0.093

−3.1 to−2.1

In-hospital mortality

1.23 (0.79–1.94), 0.362

1.25 (0.80–1.97), 0.339

1.19 (0.74–1.92), 0.474

28-day mortality

1.13 (0.74–1.73), 0.568

1.14 (0.75–1.75), 0.540

1.11 (0.71–1.74), 0.661

−2 to−1.4

In-hospital mortality

1.58 (1.00−2.49), 0.05

1.55 (0.99–2.47), 0.06

1.53 (0.96–2.47), 0.076

28-day mortality

1.65 (1.08–2.53), 0.021

1.65 (1.08–2.55), 0.022

1.66 (1.07–2.60), 0.025

−1.3 to 0

In-hospital mortality

1.0 (Ref)

1.0 (Ref)

1.0 (Ref)

28-day mortality

1.0 (Ref)

1.0 (Ref)

1.0 (Ref)

0 to 1.3

In-hospital mortality

1.24 (0.72–2.14), 0.438

1.23 (0.71–2.14), 0.452

1.14 (0.64–2.01), 0.657

28-day mortality

1.34 (0.81–2.23), 0.255

1.36 (0.81–2.26), 0.242

1.30 (0.76–2.21), 0.341

1.4 to 2.0

In-hospital mortality

1.07 (0.68–1.81), 0.804

1.11 (0.65–1.90), 0.697

0.99 (0.57–1.72), 0.971

28-day mortality

0.96 (0.58–1.59), 0.886

1.02 (0.61–1.68), 0.948

0.92 (0.54–1.56), 0.760

2.1 to 3.1

In-hospital mortality

1.65 (0.97–2.79), 0.063

1.72 (1.01–2.94), 0.044

1.63 (0.94–2.83), 0.084

28-day mortality

1.43 (0.86–2.36), 0.163

1.50 (0.90–2.50), 0.116

1.43 (0.84–2.43), 0.190

≥ 3.2

In-hospital mortality

2.95 (1.74–5.04), < 0.001

3.31 (1.94–5.70), < 0.001

2.52 (1.43–4.46), 0.001

28-day mortality

2.38 (1.43–3.99), < 0.001

2.63 (1.56–4.45), < 0.001

2.01 (1.16–3.50), 0.013