Table 2 Logistic regression analysis of postoperative allogeneic RBC transfusions in the Cohort

Univariate Logistic Regression Analysis

 Age, ≥ 48 vs. < 48 y

0.85 (0.42–1.73)

0.660

 Sex, female vs. male

1.25 (0.48–3.31)

0.648

 Height, ≥ 1.55 vs. < 1.55 m

0.57 (0.28–1.16)

0.120

 Weight, ≥ 55 vs. < 55 kg

0.74 (0.37–1.49)

0.399

 BMI, ≥ 20.5 vs. < 20.5 kg/m²

0.45 (0.21–0.98)

0.044 ^a

 ASA classification

0.223

  II vs. I

1.46 (0.66–3.19)

0.349

  III vs. I

0.59 (0.19–1.81)

0.356

 Tobacco use, Yes vs. No

0.65 (0.23–1.81)

0.406

 Crowe classification, III vs. IV

2.19 (0.72–6.68)

0.169

 HHS, ≥ 44 vs. < 44

1.17 (0.58–2.37)

0.660

 ROM, ≥ 120 vs. < 120 °

0.82 (0.40–1.67)

0.581

 LLD, ≥ 25 VS < 25 mm

2.00 (0.98–4.08)

0.057

 FO, ≥ 38 VS < 38 mm

0.70 (0.34–1.42)

0.320

 COR height, ≥ 60 vs. < 60 mm

2.23 (1.08–4.60)

0.030 ^a

 Preoperative Hb, ≥ 130 vs. < 130 g/L

0.84 (0.41–1.70)

0.618

 Preoperative HCT, ≥ 0.4 vs. < 0.4 L/L

0.81 (0.40–1.65)

0.561

 Preoperative PLT, ≥ 160 vs. < 160 10^9/L

1.29 (0.60–2.75)

0.519

 Preoperative APTT, ≥ 27.5 vs. < 27.5 s

1.10 (0.54–2.25)

0.786

 Preoperative PT, ≥ 11.1 vs. < 11.1 s

1.01 (0.50–2.06)

0.977

 Length of SSO, ≥ 30 vs. < 30 mm

2.33 (1.10–4.96)

0.028 ^a

 Intraoperative periprosthetic femoral fracture

0.491 (0.17–1.42)

0.190

 Drainage use, Yes vs. No

2.37 (1.15–4.86)

0.019 ^a

 Duration of operation, ≥ 150 vs. < 150 min

1.11 (0.53–2.33)

0.777

 Reinfusion of ICS, Yes vs. No

0.45 (0.22–0.92)

0.029 ^a

Multivariate logistic regression analysis

 BMI, ≥ 20.5 vs. < 20.5 kg/m²

0.46 (0.20–1.08)

0.076

 COR height, ≥ 60 vs. < 60 mm

3.30 (1.21–9.01)

0.020 ^a

 Length of SSO, ≥ 30 vs. < 30 mm

2.75 (1.05–7.22)

0.040 ^a

 Drainage use, Yes vs. No

2.28 (1.04–5.03)

0.041 ^a

 Reinfusion of ICS, Yes vs. No

0.17 (0.07–0.47)

< 0.001 ^a