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Table 3 Univariate and multivariate logistic regression analyses for predicting the blood transfusion risk in posterior lumbar spinal fusion

From: Establishment and assessment of a nomogram for predicting blood transfusion risk in posterior lumbar spinal fusion

Variable Univariable logistic regression analysis Multivariable logistic regression analysis
Odds ratio 95% Confidence interval P Value Odds ratio 95% Confidence interval P Value
Lower Upper Lower Upper
Age 1.5866 1.1811 2.1422 0.00235 ** 0.8805 0.5513 1.4092 0.59406
Gender 0.6799 0.5119 0.9016 0.00752 ** 1.2191 0.7671 1.9530 0.40489
Comorbidities 0.8792 0.6993 1.1044 0.269 0.9960 0.6231 1.5799 0.98656
BMI 1.0834 1.0405 1.1288 0.000114 *** 1.0468 0.9763 1.1226 0.19802
Smoker 0.0967 0.0689 0.1346 < 2e−16 *** 0.4761 0.2262 0.9969 0.074
ASA 1.6408 1.2930 2.0899 5.20e−05 *** 1.2096 0.8331 1.7633 0.31869
Levels of fusion 3.3137 2.7367 4.0465 < 2e−16 *** 1.5165 1.1653 1.9773 0.00198 **
Time to surgery 2.3990 2.1007 2.7629 < 2e−16 *** 1.2902 1.0706 1.5617 0.00802 **
Total intraoperative EBL 1.0085 1.0074 1.0098 < 2e−16 *** 1.0065 1.0050 1.0081 5.15e−16 ***
Operative time 1.0156 1.0131 1.0184 < 2e−16 *** 1.0037 0.9997 1.0080 0.01582*
Previous transfusion 2.5049 1.1064 5.7728 0.0273 * 0.5880 0.0911 3.5178 0.58191
Previous surgery 1.3657 0.8296 2.2166 0.212 1.0246 0.4132 2.3364 0.95601
Preoperative APTT 1.0672 1.0054 1.1335 0.03318 * 0.9600 0.8688 1.0605 0.42184
Preoperative PT 0.7045 0.6280 0.7877 1.29e−09 *** 0.9916 0.8342 1.1773 0.92365
Preoperative fibrinogen 0.9480 0.7854 1.1438 0.5769 1.1889 0.8591 1.6510 0.29851
Preoperative platelet count 1.0003 0.9981 1.0025 0.7849 1.0021 0.9987 1.0056 0.22155
Preoperative hematocrit 0.7882 0.7516 0.8249 < 2e−16 *** 0.9804 0.9155 1.0494 0.56961
Preoperative Hb 0.9481 0.9353 0.9605 4.36e−15 *** 0.9491 0.9303 0.9671 1.26e−07 ***
Preoperative WBC 1.0044 0.9444 1.0681 0.8889 1.0533 0.9502 1.1671 0.32149
LOS 1.453 1.0287 1.8773 0.1342 1.324 1.0872 1.5608 0.081
  1. BMI Body mass index, ASA American Stroke Association, EBL Estimated blood loss, APTT Activated partial thromboplastin time, PT Prothrombin time, HB Hemoglobin, WBC White blood cell count, LOS Length of stay