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Table 1 Baseline characteristics of patients included in the study

From: Intraoperative hypotension is a risk factor for postoperative acute kidney injury after femoral neck fracture surgery: a retrospective study

Variable

AKI (n = 44)

Non-AKI (n = 204)

P-value

Demographic characteristics

 Gender (male/female) (n, %)

12 (27.3)/32 (72.7)

54 (26.5)/150 (73.5)

0.915

 Age (years)a

79.0 ± 7.8

77.3 ± 6.9

0.153

 Length of hospital stay (days)a

27.6 ± 6.8

19.7 ± 9.0

0.002*

 Type of operation (n, %)

  

0.015*

  Bipolar hemiarthroplasty

39 (83.0)

158 (66.7)

 

  THR

7 (14.9)

41 (17.3)

 

  Osteosynthesis

1 (2.1)

38 (16.0)

 

 Comorbidities (n, %)

  Hypertension

25 (56.8)

106 (51.9)

0.560

  Diabetes mellitus

23 (52.2)

50 (24.5)

<  0.001*

  Previous renal disease

15 (34.1)

25 (12.3)

<  0.001*

  Previous heart disease

8 (18.2)

35 (17.2)

0.775

 Medication history (n, %)

  ACE inhibitor

22 (50.0)

68 (33.3)

0.037*

  NSAID

5 (11.4)

14 (6.9)

0.311

  Contrast

2 (4.6)

26 (12.7)

0.120

  Nephrotoxic antibiotics

2 (4.6)

2 (1.0)

0.089

  1. Abbreviations: ACE angiotensin-converting enzyme, AKI acute kidney injury, NSAID non-steroidal anti-inflammatory drug, THR total hip replacement
  2. aValues are presented as mean ± standard deviation
  3. *Statistically significant between the 2 groups (P <  0.05)