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

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

	PFNA-II^a	DHS^b	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^#

*Statistically significant values, ^#No statistically significant values
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

ISSN: 1471-2474