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Table 3 Ordinal logistic regression of the risk factors for blood loss in AS patients with hip involvement undergoing THA

From: Factors associated with blood loss in ankylosing spondylitis patients with hip involvement undergoing primary total hip arthroplasty: a cross-sectional retrospective study of 243 patients

Parameter OR (95% CI) P value
Male sex 3.287 (1.022 to 10.567) 0.046
BMI 0.960 (0.897 to 1.027) 0.236
Bilateral THA 13.896 (4.950 to 39.011) < 0.0001
Hip ROM = 0° 2.513 (1.277 to 4.946) 0.008
BASRI-hip score of 4 0.700 (0.345 to 1.421) 0.324
Elevated ESR level 3.042 (1.320 to 7.014) 0.009
Elevated CRP level 0.885 (0.415 to 1.888) 0.752
TT (s) 1.189 (0.880 to 1.606) 0.260
APTT (s) 0.964 (0.901 to 1.032) 0.291
Fibrinogen(g/L) 0.780 (0.562 to 1.081) 0.136
Platelet level( × 109/L) 0.997 (0.992 to 1.002) 0.211
Preoperative Hb level (g/L) 1.043 (1.017 to 1.070) 0.001
Iliopsoas and adductor release 1.934 (0.860 to 4.350) 0.111
Administration of TXA 0.252 (0.134 to 0.472) < 0.0001
Chemoprophylaxis of thrombosis 1.814 (0.896 to 3.674) 0.098
Operating time (min) 1.009 (1.003 to 1.016) 0.004
  1. AS ankylosing spondylitis, THA total hip arthroplasty, OR odds ratio, CI confidence interval, BMI body mass index, ROM range of motion, BASRI-hip Bath Ankylosing Spondylitis Radiology Hip Index, ESR erythrocyte sedimentation rate, CRP C-reactive protein, TT thromboplastin time, APTT activated partial thromboplastin time, Hb hemoglobin, TXA tranexamic acid