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Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 2 Functional outcomes at baseline prior to total hip arthroplasty and at 1-year follow-up in patients with hip osteoarthritis and healthy controls

From: Changes of and interrelationships between performance-based function and gait and patient-reported function 1 year after total hip arthroplasty

 

Hip osteoarthritis (n = 34)

Healthy controls (n = 25)

Pre-THA mean (SD)

Mean change (SD)

Effect size (95 % CI)

Post-THA mean (SD)

Control group mean (SD)

Performance-based function

 Five Times Sit to Stand Test

15.7 (6.8)

−4.1 (6.7)*

0.9 (0.3–1.4)

11.6 (2.9)

9.9 (2.9)*

 Timed Up and Go Test

12.5 (2.2)

−1.6 (2.1)

1.1 (0.5–1.6)

10.9 (1.6)

8.8 (1.4)

 Single Limb Mini Squat test

19.6 (7.7)

4.7 (7.9)*

0.8 (0.3–1.4)

24.4 (9.1)

29.3 (10.9)

Overall gait pattern

 GDI, operated limb

85.3 (9.0)

6.9 (13.3)*

0.7 (0.3–1.2)

92.2 (11.2)

96.6 (9)

 GDI, nonoperated limb

89.6 (9.7)

4.5 (12.1)*

0.5 (0.0–1.0)

94.1 (9.3)

96.6 (9)

 GDI-kinetic, operated limb

92.5 (6.3)

2.8 (9.5)

0.4 (0.0–0.9)

95.4 (8.6)

100 (8.6)*

 GDI-kinetic, nonoperated limb

90.4 (8.3)

4.7 (10.1)*

0.7 (0.2–1.2)

95.1 (10.7)

100 (8.6)

Time and distance parameters

 Walking speed (m/s)

1.1 (0.3)

0.1 (0.3)*

0.8 (0.3–1.3)

1.2 (0.2)

1.3 (0.2)*

 Normalized walking speed

0.36 (0.05)

0.04 (0.06)

0.9 (0.4–1.5)

0.40 (0.06)

0.44 (0.06)*

 Stride length (m)

1.14 (0.13)

0.08 (0.09)

1.2 (0.6–1.7)

1.21 (0.12)

1.34 (0.11)

Patient-reported function

 HOOS symptoms

40 (14)

42 (17)

3.4 (2.5–4.4)

82 (14)

95 (6)

 HOOS pain

44 (12)

42 (17)

3.6 (2.6–4.5)

86 (13)

97 (5)

 HOOS ADL

50 (14)

37 (18)

2.9 (2.0–3.7)

87 (13)

96 (7)*

 HOOS sport and recreation

26 (17)

42 (29)

2.1 (1.4–2.7)

69 (24)

98 (9)

 HOOS quality of life

28 (15)

44 (19)

3.2 (2.3–4.1)

72 (17)

95 (8)

  1. ADL activities of daily living, GDI Gait Deviation Index, HOOS Hip disability and Osteoarthritis Outcome Score
  2. p < 0.05,   p < 0.001. Paired-sample t tests were used to compare pre- and postoperative results within the hip osteoarthritis group and are reported in the column for mean change. Independent-sample t tests were used to compare postoperative results of the hip osteoarthritis group with the control group and are reported in the column for control group mean