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

Table 3 Univariate and multivariable logistic regression analysis to identify risk factors for abnormal postoperative laboratory tests with intervention

Variables	Unadjusted odds ratio (95% CI)	P value	Adjusted odds ratio (95% CI)	P value
Age	1.07 (0.97 ~ 1.19)	0.44	1.04 (0.93 ~ 1.13)	0.50
Sex	0.28 (0.19 ~ 1.07)	0.94	0.32 (0.21 ~ 1.14)	0.98
BMI	1.02 (0.93 ~ 1.11)	0.71	1.01 (0.9 ~ 1.14)	0.85
ASA	0.59 (0.31 ~ 1.09)	0.23	0.67 (0.34 ~ 1.27)	0.23
CCI	1.09 (1.03 ~ 1.15)	0.01*	1.05 (1.03 ~ 1.09)	0.04*
Time from fracture to operation	0.56 (0.24 ~ 1.27)	0.88	0.52 (0.23 ~ 1.24)	0.85
Preoperative hemoglobin	1.01 (0.96 ~ 1.05)	0.11	1.03 (0.98 ~ 1.09)	0.16
Preoperative albumin	0.98. (0.89 ~ 1.21)	0.26	1.06 (0.91 ~ 1.25)	0.40
Preoperative serum sodium	0.66 (0.25 ~ 1.24)	0.69	0.63 (0.29 ~ 1.17)	0.68
Preoperative serum potassium	0.77 (0.69 ~ 1.28)	0.44	0.71 (0.59 ~ 1.21)	0.44
Preoperative serum calcium	0.44 (0.38 ~ 1.09)	0.68	0.43 (0.38 ~ 1.05)	0.68
Operation time	0.99 (0.92 ~ 1.06)	0.11	0.93 (0.86 ~ 1.01)	0.12
Blood loss	0.94 (0.88 ~ 1.01)	0.06	0.98 (0.96 ~ 1.06)	0.19
Tranexamic acid use	1.28 (0.56 ~ 1.53)	0.66	1.31 (0.76 ~ 1.62)	0.69
Drainage tube use	0.73 (0.51 ~ 1.44)	0.85	0.76 (0.54 ~ 1.45)	0.99

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

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