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Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 2 WOMAC and HSS at 12 and 24 months

From: Unexpected early loosening of rectangular straight femoral Zweymüller stems with an alumina-reduced surface after total hip arthroplasty—a prospective, double-blind, randomized controlled trial

 

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

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