Table 3 Comparison of variables between patients with abnormal postoperative laboratory tests and with or without intervention

N (%)

153

54

Preoperative variables

 Age (years)

72.0 ± 10.4

76.6 ± 9.9

 Gender

110F:43 M

42F:12 M

 BMI (kg/m²)

22.7 ± 3.7

21.4 ± 3.2

 ASA score

2.8 ± 0.6

3.0 ± 0.6

 Diabetes

25

14

 Anemia

56

33

 Hemoglobin level (g/L)

121.8 ± 14.2

111.1 ± 17.6

 Hypoalbuminemia

7

15

 Albumin level (g/L)

40.1 ± 4.2

37.0 ± 4.5

 Abnormal creatinine

18

17

 Creatinine level (μmol/L)

72.3 ± 42.2

90.8 ± 74.7

 Abnormal sodium

10

6

 Sodium level (mmol/L)

141.1 ± 2.9

140.2 ± 3.1

 Abnormal potassium

12

7

 Potassium level (mmol/L)

4.0 ± 0.4

4.0 ± 0.5

 Abnormal calcium

11

15

 Calcium level (mmol/L)

2.26 ± 0.10

2.22 ± 0.16

 Preoperative LOS (days)

5.9 ± 3.8

7.0 ± 3.5

Intraoperative variables

 TXA use

138

48

 Estimated blood loss (mL)

102.6 ± 61.0

163.9 ± 144.8

 Operation time (min)

64.8 ± 24.1

83.2 ± 41.9

Postoperative variables

 Drop in hemoglobin (g/L)

17.5 ± 9.8

18.8 ± 13.9

 Drop in albumin (g/L)

6.9 ± 4.0

7.9 ± 4.5

 Drop in creatine (μmol/L)

1.93 ± 10.71

0.67 ± 36.81

 Drop in sodium (mmol/L)

1.1 ± 3.0

0.8 ± 3.5

 Drop in potassium (mmol/L)

− 0.34 ± 0.50

− 0.33 ± 0.59

 Drop in calcium (mmol/L)

0.15 ± 0.12

0.19 ± 0.18

 Postoperative LOS (days)

8.1 ± 3.4

9.7 ± 3.9