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

Table 3 Yearly change in the patient-reported outcome measures (β) during the 1^st and 2^nd postoperative years

Outcome measure		1st yr		2nd yr
		β (95%CI)1	P value	β (95%CI)1	P value
HOOS
	Symptoms	34.8 (31.9, 37.6)	< 0.001	0.7 (-0.9, 2.3)	0.38
	Pain	36.8 (34.0, 39.7)	< 0.001	0.3 (-1.0, 1.6)	0.63
	ADL	36.2 (33.3, 39.1)	< 0.001	0.9 (-0.6, 2.5)	0.24
	Sports and recreation	43.3 (39.7, 46.9)	< 0.001	-0.1 (-2.6, 2.4)	0.93
	Quality of life	41.8 (38.7, 45.0)	< 0.001	1.5 (-0.7, 3.8)	0.18
SF-36
	Physical functioning	34.5 (31.4, 37.7)	< 0.001	0.8 (-1.7, 3.4)	0.56
	Role physical	54.4 (49.0, 59.7)	< 0.001	-1.2 (-6.2, 3.8)	0.64
	Bodily pain	36.5 (33.4, 39.6)	< 0.001	-0.4 (-3.3, 2.6)	0.80
	Social functioning	22.8 (19.5, 26.0)	< 0.001	-0.9 (-3.5, 1.7)	0.49
	Mental health	6.1 (4.1, 8.1)	< 0.001	-0.7 (-2.4, 1.1)	0.45
	Role emotional	23.3 (18.1, 28.5)	< 0.001	0.0 (-4.4, 4.5)	1.00
	Vitality	10.8 (8.5, 13.1)	< 0.001	-0.6 (-2.6, 1.4)	0.56
	General health perceptions	2.4 (0.3, 4.6)	0.03	0.1 (-1.7, 1.8)	0.95

¹Mixed model analysis. ADL: Activities in daily living; CI: Confidence interval; HOOS: Hip Disability and Osteoarthritis Outcome Score; SF-36: 36-item short form survey.