Table 2 Functional task performance, functional pain and patient reported physical activity and disability. Values are means SD [95% CI]

Gait speed, self-selected (m/s)

0.91 ± 0.18 [0.83–0.98]

1.07 ± 0.22 [0.95–1.20]

.015

Gait speed, fastest, comfortable (m/s)

1.41 ± 0.20 [1.31–1.51]

1.58 ± 0.17 [1.49–1.67]

.017

Pain with walking (points)

0.6 ± 1.2 [0.11–1.20]

0.0

Chair rise repetitions (#)

12.5 ± 2.6 [11.4–13.5]

17.3 ± 3.2 [15.6–19.0]

<.001

Chair rise pain (points)

0.8 ± 1.3 [0.3–1.3]

0.0

Stair climb time (s)

3.7 ± 0.8 [3.3–4.0]

2.9 ± 0.7 [2.6–3.2]

.003

Stair climb pain (points)

0.9 ± 1.5 [0.3–1.5]

0.0

Stair descent time (s)

3.8 ± 1.0 [3.4–4.3]

3.0 ± 0.7 [2.6–3.4]

.011

Stair descent pain (points)

0.9 ± 1.4 [0.3–1.5]

0.0

PROMIS Pain Interference (points)

12.5 ± 9.4 [8.5–16.6]

4.8 ± 4.0 [2.8–6.9]

.001

PROMIS Physical Function and Mobility (points)

31.8 ± 7.2 [28.9–34.8]

34.5 ± 4.1 [32.4–36.6]

.165

Pedi-FABS (points)

13.4 ± 9.3 [9.6–17.3]

16.8 ± 7.3 [13.1–20.6]

.238