Table 2.

WOMAC and HSS at 12 and 24 months

	Preoperative		12 months follow-up		24 months follow-up
	STD stem n = 26	NT stem n = 23	STD stem n = 21	NT stem n = 20	STD stem n = 20	NT stem n = 15
	Mean (SD)	Mean (SD)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)
Harris hip score
Total score	54.8 (± 11.9)	57.2 (± 14.3)	94.0 (90.1–97.9)	83.3 (73.4–93.2)	95.4 (92.4–98.4)	95.3 (89.8–100.8)
			p = 0.13		p = 0.70
• Pain score	15.5 (± 6.7)	16.3 (± 8.3)	41.9 (39.7–44.0)	33.4 (26.2–40.5)	43.0 (41.5–44.4)	40.4 (36.4–44.5)
			p = 0.70		p = 0.70
• Function gait score	30.8 (± 6.26)	32.5 m(± 7.4)	43.2 (40.7–45.6)	41.0 (37.4–44.6)	43.5 (40.6–46.4)	45.9 (44.4–47.5)
			p = 0.44		p = 0.33
• Absence of deformities	3.95 (± 0.21)	3.84 (± 0.37)	4.00	4.00	4.00	4.00
• Range of motion	4.66 (± 0. 32)	4.62 (± 0. 47)	4.9 (4.9–5.0)	4.9 (4.8–5.1)	4.9 (4.9–5.0)	4.9 (4.9–5.0)
			p = 0.78		p = 0.72

	Preoperative		12 months follow-up		24 months follow-up
	STD stem n = 26	NT stem n = 23	STD stem n = 21	NT stem n = 20	STD stem n = 20	NT stem n = 15
	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)
WOMAC
Total score	48.8 (43–54)	49.0 (41–56)	96.3 (93–99)	84.5 (76–93)	95.6 (91–100)	92.8 (86–100)
			p = 0.02		p = 0.54
• Pain	53.8 (48–60)	46.8 (39–54)	97.6 (95–100)	84.3 (75–93)	98.8 (96–101)	95.0 (90–100)
			p =  < 0.01		p = 0.08
• Stiffness	50.5 (41–60)	50.6 (41–60)	96.4 (93–100)	84.4 (73–96)	96.3 (92–100)	94.2 (87–101)
			p = 0.09		p = 0.87
• Physical activity	47.1 (41–53)	45.6 (41–57)	95.8 (92–99)	84.6 (76–94)	94.6 89–100)	92.0 (84–99)
			p = 0.049		p = 0.57

CI confidence interval, n number, na not available, NT new technology, SD standard deviation, STD standard, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index