Table 2 Association between serum iCa and tCa levels and mortality in patients with AIS

30-day mortality

 iCa (mmol/L)

  Q1 (iCa<1.07)

2.06(1.54,2.77)

<0.001

2.14(1.59,2.88)

<0.001

1.65(1.22,2.25)

<0.001

1.58(1.16,2.15)

0.004

  Q2 (1.07≤iCa< 1.12)

1.83(1.35,2.48)

<0.001

1.84(1.36,2.49)

<0.001

1.64(1.21,2.23)

0.001

1.55(1.13,2.11)

0.006

  Q3 (1.12≤iCa< 1.17)

1

1

1

1

  Q4 (1.17≤iCa)

1.43(1.06,1.94)

0.020

1.42(1.05,1.93)

0.023

1.55(1.14,2.12)

0.005

1.53(1.12,2.09)

0.008

 tCa (mg/dL)

  Q1 (tCa<7.9)

1.14(0.87,1.50)

0.328

1.21(0.93,1.59)

0.160

0.94(0.71,1.24)

0.64

0.85(0.63,1.14)

0.272

  Q2 (7.9≤tCa<8.4)

1.06(0.81,1.38)

0.669

1.09(0.84,1.42)

0.518

1.13(0.87,1.48)

0.36

1.04(0.80,1.37)

0.751

  Q3 (8.4≤tCa<9.0)

1

1

1

1

  Q4 (9.0≤tCa)

0.84(0.63,1.10)

0.206

0.81(0.61,1.07)

0.132

0.86(0.65,1.15)

0.31

0.83(0.62,1.10)

0.195

90-day mortality

 iCa (mmol/L)

  Q1 (iCa<1.07)

1.88(1.47,2.42)

<0.001

2.01(1.56,2.59)

<0.001

1.58(1.22,2.04)

<0.001

1.46(1.12,1.90)

0.004

  Q2 (1.07≤iCa< 1.12)

1.55(1.20,2.02)

0.001

1.58(1.21,2.05)

<0.001

1.44(1.11,1.88)

0.007

1.36(1.04,1.77)

0.026

  Q3 (1.12≤iCa<1.17)

1

1

1

1

  Q4 (1.17≤iCa)

1.28(0.99,1.66)

0.059

1.28(0.99,1.66)

0.063

1.42(1.09,1.84)

<0.01

1.43(1.10,1.87)

0.008

 tCa (mg/dL)

  Q1 (tCa<7.9)

1.12(0.88,1.42)

0.355

1.20(0.94,1.53)

0.137

0.91(0.71,1.17)

0.473

0.83(0.64,1.08)

0.175

  Q2 (7.9≤tCa<8.4)

1.07(0.85,1.35)

0.546

1.10(0.87,1.38)

0.424

1.16(0.92,1.47)

0.209

1.09(0.86,1.39)

0.455

  Q3 (8.4≤tCa<9.0)

1

1

1

1

  Q4 (9.0≤tCa)

0.83(0.65,1.06)

0.133

0.80(0.62,1.02)

0.071

0.87(0.68,1.11)

0.260

0.84(0.65,1.07)

0.16

365-day mortality

 iCa (mmol/L)

  Q1 (iCa<1.07)

1.70(1.36,2.12)

<0.001

1.85(1.48,2.31)

<0.001

1.48(1.18,1.86)

<0.001

1.37(1.09,1.73)

0.008

  Q2 (1.07≤iCa<1.12)

1.45(1.15,1.82)

0.002

1.48(1.17,1.86)

<0.001

1.36(1.08,1.72)

0.009

1.30(1.02,1.63)

0.033

  Q3 (1.12≤iCa<1.17)

1

1

1

1

  Q4 (1.17≤iCa)

1.11(0.89,1.40)

0.356

1.10(0.88,1.39)

0.403

1.23(0.97,1.55)

0.089

1.22(0.97,1.55)

0.093

 tCa (mg/dL)

  Q1 (tCa<7.9)

1.00(0.81,1.25)

0.988

1.08(0.87,1.35)

0.478

0.84(0.67,1.05)

0.127

0.81(0.64,1.03)

0.091

  Q2 (7.9≤tCa<8.4)

0.97(0.79,1.20)

0.783

0.98(0.80,1.21)

0.884

1.05(0.85,1.29)

0.663

1.03(0.83,1.28)

0.806

  Q3 (8.4≤tCa<9.0)

1

1

1

1

  Q4 (9.0≤tCa)

0.83(0.67,1.03)

0.087

0.79(0.63,0.98)

0.03

0.84(0.68,1.05)

0.128

0.80(0.65,1.00)

0.068