Table 4 Mean different from base line (95% CI) of Knee Injury and Osteoarthritis Outcome Scores (KOOS)

Pain

Hip exercise

8.83 (1.82–15.8) p = 0.01

14.45 (7.97–20.9) p < 0.01

15.88 (9.25–22.5) p < 0.01

17.23 (10.6–23.8) p < 0.01

18.68 (11.8–25.6) p < 0.01

Control

5.05(−1.69–11.8) p = 0.14

7.94 (1.04–14.8) p = 0.02

10.24 (4.22–16.3) p < 0.01

14.32 (8.30–20.3) p < 0.01

16.69 (10.9–22.5) p < 0.01

Symptoms

Hip exercise

9.95 (3.14–16.8) p < 0.01

9.85 (2.97–16.7) p < 0.01

8.23 (1.39–15.1) p < 0.01

11.75 (4.83–18.7) p = 0.02

14.65 (8.20–21.1) p < 0.01

Control

3.68(−2.70–10.1) p = 0.26

5.14 (− 1.14–11.4) p = 0.11

6.21 (0.38–12) p = 0.04

10.47 (4.70–16.3) p < 0.01

9.09 (2.84–15.3) p < 0.01

Activities of daily living

Hip exercise

8.14 (1.05–15.2) p = 0.02

14.05 (7.78–20.3) p < 0.01

14.84 (8.63–21) p < 0.01

17.08 (11.1–23.0) p < 0.01

15.19 (8.77–21.6) p < 0.01

Control

4.91(−1.86–11.7) p = 0.16

7.29 (0.38–14.2) p = 0.04

8.72 (1.98–15.5) p = 0.01

11.18 (4.47–17.9) p < 0.01

13.84 (7.29–20.4) p < 0.01

Sports and recreation

Hip exercise

5.24(−5.54–16) p = 0.34

3.89(−6.02–13.8) p = 0.44

9.99(− 1.14–21.1) p = 0.08

11.22(− 1.35–23.8) p = 0.08

17.79 (5.08–30.5) p < 0.01

Control

4.55(− 13.8–7.53) p = 0.4

6.25(− 6–15.1) p = 0.24

10.13(− 4.22–16.7) p = 0.07

13.34(− 0.74–21) p = 0.02

22.69 (2.6–24.1) p < 0.01

Quality of life

Hip exercise

8.4 (0.35–16.5) p = 0.04

13.92 (5.38–22.5) p < 0.01

17.28 (8.59–26) p < 0.01

19.92 (11–28.9) p < 0.01

24.12 (15.6–32.6) p < 0.01

Control

7.32(− 0.36–15) p = 0.06

10.2 (2.33–18.1) p = 0.01

13.74 (6.09–21.4) p < 0.01

20.1 (12.4–27.8) p < 0.01

27.09 (19.3–34.9) p < 0.01