Mid-term survival of the Optimys short stem: A prospective case series of 500 patients

Table 2 Hip Disability and Osteoarthritis Outcome Score and 36-item short form survey baseline and follow-up scores

Outcome		Baseline, n = 471	6 wk, n = 388	3 months, n = 371	6 months, n = 355	1 yr, n = 317	2 yr, n = 233
HOOS
	Symptoms	42.1 (18.1)	71.6 (18.2)	76.3 (17.9)	81.1 (17.7)	85.9 (16.2)	85.9 (16.7)
	Pain	42.5 (16.5)	77.4 (16.7)	83.7 (16.6)	87.1 (15.8)	89.6 (15.0)	90.2 (14.7)
	ADL	42.6 (17.5)	74.7 (17.8)	81.0 (17.8)	85.4 (16.1)	88.6 (16.4)	89.5 (15.4)
	Sports and recreation	24.3 (19.6)	51.9 (26.8)	65.6 (25.1)	71.2 (24.9)	77.1 (24.2)	77.0 (24.9)
	Quality of life	25.9 (15.7)	54.6 (20.4)	66.9 (22.3)	72.8 (21.8)	78.4 (21.6)	80.0 (21.0)
SF 36
	Physical functioning	35.6 (18.6)	57.8 (22.8)	69.6 (22.4)	74.5 (22.4)	78.7 (22.4)	81.8 (19.8)
	Role physical	23.3 (35.7)	29.5 (36.0)	57.5 (42.5)	71.0 (40.4)	81.0 (34.9)	80.8 (34.4)
	Bodily pain	35.7 (17.2)	55.9 (22.1)	70.7 (22.1)	75.9 (21.2)	80.6 (22.4)	80.8 (22.8)
	Social functioning	61.0 (26.0)	68.1 (26.0)	79.9 (23.8)	85.0 (21.0)	88.5 (19.3)	87.7 (20.4)
	Mental health	73.4 (17.8)	80.2 (16.2)	82.0 (16.3)	81.8 (15.7)	83.1 (15.0)	83.0 (14.3)
	Role emotional	63.3 (43.7)	67.5 (41.5)	77.2 (38.2)	84.1 (33.6)	89.6 (27.0)	90.0 (27.2)
	Vitality	57.3 (19.9)	66.0 (18.4)	69.5 (18.4)	70.8 (18.2)	72.9 (17.4)	73.9 (16.7)
	General health perceptions	66.6 (18.5)	73.5 (17.9)	72.4 (19.0)	70.4 (19.7)	72.0 (19.9)	73.4 (18.5)

Data are mean (standard deviation). ADL: Activities of daily living; HOOS: Hip Disability and Osteoarthritis Outcome Score, SF-36: 36-item Short Form Survey.