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Table 2 Baseline characteristics of the population according to the cut-off value of PNI

From: The prognostic nutritional index predicts all-cause mortality in critically ill patients with acute myocardial infarction

Variables

Group 1 (n = 545)

Group 2 (n = 635)

p-value

Demographics

 Age (years)

70 (61.00–78.00)

67.00 (58.00–74.00)

< 0.001

 Male, n (%)

336 (61.65)

445 (70.08)

0.002

 SBP (mmHg)

110.97 (103.67-120.55)

112.13 (106.30-119.31)

0.061

 DBP (mmHg)

59.30 (54.07–66.82)

59.53 (53.64–65.54)

0.828

 CCU, n (%)

254 (46.61)

550 (86.61)

< 0.001

Risk factors, n (%)

 Hypertension

124 (22.75)

272 (42.83)

< 0.001

 AF

253 (46.42)

228 (35.91)

< 0.001

 CHF

324 (59.45)

234 (36.85)

< 0.001

 CKD

239 (43.85)

160 (25.20)

< 0.001

 Non-STEMI

456 (83.67)

532 (83.78)

0.959

 DM

246 (45.14)

297 (46.77)

0.574

Biochemical parameters

 HB (g/dL)

10.20 (8.70–11.90)

12.70 (11.10–14.10)

< 0.001

 Bicarbonate (mmol/L)

22.00 (20.00–25.00)

24.00 (22.00–26.00)

< 0.001

 CR (mg/dL)

1.70 (1.20–3.10)

1.10 (0.80–1.40)

< 0.001

 Potassium (mmol/L)

4.70 (4.20–5.30)

4.60 (4.40-5.00)

0.912

 PT (s)

15.30 (13.30-18.95)

15.10 (13.40–17.00)

0.028

Cardiovascular medications, n (%)

 Antiplatelet drugs

472 (86.61)

615 (96.85)

< 0.001

 β-blockers

400 (73.39)

586 (92.28)

< 0.001

 ACEI/ARB

174 (31.93)

311 (48.98)

< 0.001

 Statins

454 (83.30)

607 (95.59)

< 0.001

Score system

 SOFA score

8.00 (6.00–12.00)

6.00 (4.00–8.00)

< 0.001

 CCI

8.00 (6.00–10.00)

6.00 (5.00–8.00)

< 0.001

Outcome

 ICU LOS (days)

4.10 (2.36–7.37)

2.22 (1.35–3.85)

< 0.001

All-cause-mortality, n (%)

 In-hospital mortality

136 (24.95)

44 (6.93)

< 0.001

 6-month mortality

160 (29.36)

50 (7.87)

< 0.001

 1-year mortality

167 (30.64)

50 (7.87)

< 0.001

  1. A median with IQR, n (%). SBP: systolic blood pressure; DBP: diastolic blood pressure; CCU: cardiac care unit; AF: atrial fibrillation; CHF: congestive heart failure; CKD: chronic kidney disease; non-STEMI: non-ST segment elevation myocardial infarction; DM: diabetes mellitus; HB: hemoglobin; CR: creatinine; PT: prothrombin time; ACEI/ARB: angiotensin-converting enzyme inhibitors/angiotensin receptor blockers; SOFA score: sequential organ failure assessment score; CCI: charlson comorbidity index; ICU LOS: intensive care unit length of stay. A p value < 0.05 was regarded as statistical significance. Group 1: PNI < 41.50, Group 2: PNI ≥ 41.50