Comparison of a Minimally Invasive Tissue-Sparing Posterior Superior (TSPS) Approach and the Standard Posterior Approach for Hip Replacement

Table 4

Multiple regression analysis considering HHS and WOMAC score at 4-month follow-up as the main outcomes.

Variables	4-month HHS			4-month WOMAC
	Coeff	SE	value	Coeff	SE	value
Age (y)	+0.103	0.156	0.5125	-0.206	0.162	0.2144
Sex (F)	+2.641	3.700	0.4809	-6.874	3.817	0.0817
ASA classification	+1.044	3.782	0.7843	+3.467	3.976	0.3902
BMI (kg/m^2)	-0.238	0.490	0.6301	-0.523	0.542	0.3424
TSPS approach	-5.733	3.106	0.0748	+8.417	3.279	0.0155
Preoperative Hb	+1.053	1.262	0.4105	-1.456	1.322	0.2795
Preoperative HHS	-0.111	0.123	0.3727	NA	NA	NA
Preoperative WOMAC	NA	NA	NA	-0.103	0.078	0.1943

Statistically significant predictors () are marked in bold and with . Abbreviations: Coeff: coefficient; SE: standard error; F: female; ASA, American Society of Anesthesiologists; BMI: body mass index; TSPS: tissue-sparing posterior-superior; Hb: hemoglobin; HHS: Harris hip score; WOMAC: Western Ontario and McMaster Universities Arthritis Index.