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Table 2 Univariate and multivariable logistic regression analysis to identify risk factors for abnormal postoperative laboratory tests

From: The role of routine postoperative laboratory tests following hip hemiarthroplasty for an elderly femoral neck fracture

Variables

Unadjusted odds ratio (95% CI)

P value

Adjusted odds ratio (95% CI)

P value

Age

1.13 (1.02 ~ 1.26)

0.05*

1.12 (0.99 ~ 1.26)

0.08

Sex

0.83 (0.77 ~ 1.18)

0.19

0.87 (0.77 ~ 1.09)

0.28

BMI

0.94 (0.81 ~ 1.08)

0.64

0.98 (0.89 ~ 1.07)

0.72

ASA

0.67 (0.33 ~ 1.24)

0.21

0.67 (0.34 ~ 1.25)

0.22

CCI

1.29 (1.17 ~ 1.41)

0.01*

1.28 (1.19 ~ 1.4)

0.03*

Time from fracture to operation

0.65 (0.39 ~ 1.09)

0.16

0.69 (0.39 ~ 1.08)

0.18

Preoperative hemoglobin

0.71 (0.39 ~ 0.97)

< 0.01*

0.75 0.42 ~ 0.98)

< 0.01*

Preoperative albumin

1.04 (0.83 ~ 1.25)

0.66

1.04 (0.89 ~ 1.22)

0.63

Preoperative serum sodium

0.69 (0.32 ~ 1.74)

0.39

0.67 (0.25 ~ 1.8)

0.41

Preoperative serum potassium

0.51 (0.3 ~ 1.17)

0.22

0.55 (0.34 ~ 1.23)

0.23

Preoperative serum calcium

0.37 (0.26 ~ 1.05)

0.17

0.36 (0.19–1.07)

0.18

Operation time

0.96 (0.93 ~ 1.02)

0.58

0.98 (0.92 ~ 1.04)

0.62

Blood loss

1.13 (1.02 ~ 1.38)

< 0.01*

1.09 (1.02 ~ 1.35)

< 0.01*

Tranexamic acid use

0.52 (0.31 ~ 0.98)

0.04*

0.54 (0.33 ~ 0.99)

0.05*

Drainage tube use

0.99 (0.55 ~ 1.23)

0.24

1 (0.6 ~ 1.21)

0.26

  1. BMI body mass index, ASA American Society of Anesthesiologists, CCI Charlson Comorbidity Index, ED emergency department