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Table 2 Multivariate regression analyses of confounding factors

From: The need for nutritional assessment and interventions based on the prognostic nutritional index for patients with femoral fractures: a retrospective study

Confounding factors OR (95% CI) P values
PNI at admission (per 1) 0.850 (0.776, 0.931) < 0.001
Age (per 1 year) 1.041 (1.016, 1.066) 0.001
Postoperative hospital stay (per 1 day) 1.132 (1.016, 1.263) 0.025
Time to admission (per 1) 1.343 (1.056, 1.708) 0.016
Hypertension (ref: no) 2.091 (1.116, 3.916) 0.021
Combined injuries (ref: no) 2.836 (1.340, 6.003) 0.006
Operation types (ref: hip replacement) 4.625 (2.283, 9.367) < 0.001
ASA (per I) 1.411 (0.718, 2.773) 0.317
Blood transfusion (ref: no) 1.040 (0.500, 2.163) 0.916
Intraoperative blood loss (per 1 × 102 ml) 1.042 (0.878, 1.238) 0.638
PAb at admission (per 1 mg/l) 1.000 (0.993, 1.008) 0.950
Hb at admission (per 1 g/l) 1.015 (0.990, 1.040) 0.244
LYM count at admission (per 1 × 109/l) 1.520 (0.677, 3.411) 0.310
NETU count at admission (per 1 × 109/l) 1.015 (0.892, 1.155) 0.822
PAb at 1 day postoperatively (per 1 mg/l) 1.009 (0.995, 1.023) 0.191
Hb at 1 day postoperatively (per 1 g/l) 0.989 (0.959, 1.019) 0.460
GLB at 1 day postoperatively (per 1 g/l) 0.990 (0.915, 1.071) 0.804
LYM count at 1 day postoperatively (per 1 × 109/l) 1.016 (0.249, 4.143) 0.982
NETU count at 1 day postoperatively (per 1 × 109/l) 1.055(0.936, 1.189) 0.377
NLR at 1 day postoperatively (per 1) 0.991 (0.922, 1.064) 0.797
PNI at 1 day postoperatively (per 1) 0.925 (0.822, 1.040) 0.193
PAb before discharge (per 1 mg/l) 0.997 (0.987, 1.008) 0.630
  1. The ALB concentration was not included in the model and showed significant collinearity with PNI. Bold fonts represent independent factors with P < 0.05
  2. ALB albumin, ASA American Society of Anesthesiologists, GLB globulin, Hb haemoglobin, LYM lymphocyte, NEUT neutrophil, NLR neutrophil to lymphocyte ratio, PAb Prealbumin, PNI prognostic nutritional index, OR odds ratio