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Table 3 Pre-and post-operative change in hemoglobin levels (x ± s)

From: The visible and hidden blood loss of Asia proximal femoral nail anti-rotation and dynamic hip screw in the treatment of intertrochanteric fractures of elderly high- risk patients: a retrospective comparative study with a minimum 3 years of follow-up

  PFNA-IIa DHSb p-value
Preoperative hemoglobin level (g/L) 125.07 ± 1.60 123.40 ± 1.79 0.098#
Preoperative Hct (%) 32.64 ± 2.59 32.13 ± 2.59 0.837#
Postoperative hemoglobin level (g/L) 103.59 ± 2.01 101.39 ± 2.31 0.016#
Postoperative Hct (%) 27.05 ± 0.53 25.92 ± 0.61 0.009*
Hemoglobin level loss (g/L) 21.47 ± 2.40 22.01 ± 2.98 0.001*
PT(s) 10.0 ± 0.6 10.0 ± 0.59 0.195#
APTT(s) 26.2 ± 1.7 26.0 ± 1.8 0.337#
INR 1.0 ± 0.1 1.0 ± 0.1 0.351#
  1. *Statistically significant values, #No statistically significant values
  2. PFNA-II Asia proximal femoral nail anti-rotation-Asia; DHS dynamic hip screw; Hb hemoglobin; PT prothrombin time; APTT activated partial thromboplastin time; INR international normalized ratio; Hct haematocrit. aSmith & Nephew, Memphis, Tennessee; bSynthes, West Chester, PA, USA