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Table 2 Comparisons of characteristics between Survivors and Non–survivors

From: Association between delta anion gap and hospital mortality for patients in cardiothoracic surgery recovery unit: a retrospective cohort study

Variable

Survivors (n = 2841)

Non–survivors (n = 19)

p value

Age (y)

67.7 ± 12.1

81.2 ± 8.6

< 0.001*

Male, n (%)

1927 (67.8)

7 (36.8)

0.002*

White, n (%)

2249 (79.2)

12 (63.2)

0.088

Body mass index, Kg/m2

28.9 ± 6.0

28.8 ± 6.3

0.986

Ventilation, n (%)

2428 (85.5)

11 (57.9)

0.001*

SOFA

5(3–7)

6(4–8)

0.109

SAPS II

36.8 ± 12.5

51.2 ± 13.5

< 0.001*

SIRS

2.8 ± 0.9

3.2 ± 0.9

0.077

Comorbidities

 COPD, n (%)

20 (0.7)

0 (0)

> 0.999

 Hypertension, n (%)

1780 (62.7)

6 (31.6)

0.005*

 Diabetes, n (%)

910 (32.0)

7 (36.8)

0.654

AG initial (mEq/L)

11.3 ± 2.6

15.8 ± 4.1

< 0.001*

AGmax (mEq/L)

12.9 ± 3.3

21.9 ± 8.2

< 0.001*

ΔAG (mEq/L)

2 (1–5)

7 (4–15)

< 0.001*

ΔNa + (mEq/L)

7 (5–9)

13 (5–20)

0.012*

ΔCl − (mEq/L)

4 (3–7)

4 (0–9)

< 0.001*

ΔHCO3 − (mEq/L)

7 (5–9)

14 (7–19)

< 0.001*

Postoperative complications, n (%)

 AKF

381 (13.4)

11 (57.9)

< 0.001*

 Acidosis

146 (5.1)

4 (21.1)

0.015*

Arrhythmia

1175 (41.4)

13 (68.4)

0.017*

Acute respiratory failure

151 (5.3)

5 (26.3)

0.003*

Pneumonia

26 (0.9)

2 (10.5)

0.014*

Pulmonary embolism

21 (0.7)

0 (0.0)

> 0.999

Laboratory indexes on POD1

 Serum creatinine (mg/dL)

0.9 (0.8–1.2)

1.5 (0.8–2.2)

0.001*

 Urea nitrogen (mg/dL)

19 (14–26)

38 (22–63)

< 0.001*

 Glucose (mg/dL)

127.6 ± 18.9

144.2 ± 51.8

< 0.001*

 pH

7.40 ± 0.06

7.31 ± 0.13

< 0.001*

 Base excess (mEq/L)

1 (0–3)

− 1 (− 9–1)

< 0.001*

 Lactate (mmol/L)

1.3 (1–1.6)

1.7 (1.4–2.8)

0.002*

  1. SOFA sequential organ failure assessment, SAPSII simplified acute physiology score II, SIRS systemic inflammatory response syndrome, AKF acute kidney failure, COPD chronic obstructive pulmonary disease, AG anion gap