Skip to main content

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 1 Baseline characteristics of the study cohorts

From: The necessity of routine postoperative laboratory tests after total hip arthroplasty for hip fracture in a semi-urgent clinical setting

Variables

Total

Normal postoperative labs

Abnormal postoperative labs

P value

N (%)

213 (100%)

6 (11.6%)

207 (88.4%)

 

Preoperative variables

 Age (years)

72.7 ± 10.7

57.5 ± 9.3

73.2 ± 10.4

 < 0.001

 Gender

155F:58 M

3F:3 M

152F:55 M

0.348

 BMI (kg/m2)

22.4 ± 3.6

23.8 ± 2.1

22.4 ± 3.6

0.377

 ASA score

2.8 ± 0.6

2.3 ± 0.5

2.8 ± 0.6

0.057

 Diabetes

39

0

39

0.595

 Anemia

89

0

89

0.042

 Hemoglobin level (g/L)

119.6 ± 16.0

139.0 ± 9.7

119.0 ± 15.9

0.002

 Hypoalbuminemia

22

0

22

0.871

 Albumin Level (g/L)

39.4 ± 4.5

43.3 ± 1.9

39.3 ± 4.5

0.029

 Abnormal creatinine

35

0

35

0.592

 Creatinine level (μmol/L)

77.0 ± 52.4

73.7 ± 11.5

77.1 ± 53.1

0.875

 Abnormal sodium

16

0

16

 > 0.999

 Sodium level (mmol/L)

140.9 ± 3.0

143.3 ± 1.8

140.9 ± 3.0

0.043

 Abnormal potassium

19

0

19

0.959

 Potassium level (mmol/L)

4.0 ± 0.4

4.1 ± 0.3

4.0 ± 0.5

0.783

 Abnormal calcium

27

1

26

0.561

 Calcium level (mmol/L)

2.25 ± 0.12

2.36 ± 0.10

2.25 ± 0.12

0.031

 Preoperative LOS (days)

6.1 ± 3.7

4.2 ± 1.0

6.2 ± 3.7

0.189

Intraoperative variables

 TXA use

192

6

186

0.787

 Estimated blood loss (mL)

117.0 ± 93.5

75.0 ± 27.4

118.2 ± 94.5

0.266

 Operation time (min)

69.0 ± 30.6

48.2 ± 16.6

69.6 ± 30.8

0.092

Postoperative variables

 Drop in hemoglobin (g/L)

17.6 ± 11.0

8.5 ± 7.6

17.9 ± 11.0

0.040

 Drop in albumin (g/L)

7.1 ± 4.1

4.7 ± 2.7

7.1 ± 4.1

0.147

 Drop in creatine (μmol/L)

1.8 ± 20.6

6.7 ± 5.6

1.6 ± 20.8

0.553

 Drop in sodium (mmol/L)

1.1 ± 3.1

2.3 ± 1.9

1.1 ± 3.2

0.326

 Drop in potassium (mmol/L)

− 0.34 ± 0.52

− 0.32 ± 0.47

− 0.34 ± 0.53

0.930

 Drop in calcium (mmol/L)

0.16 ± 0.14

0.17 ± 0.11

0.18 ± 0.14

0.876

 Postoperative LOS (days)

8.46 ± 3.5

6.0 ± 0.9

8.5 ± 3.6

 < 0.001

  1. N number, F female, M male, BMI body mass index, ASA American Society of Anesthesiologists, LOS length of stay, TXA tranexamic acid