Table 3

Outcomes from baseline to 2 years for non-operated children, n=34*†

nBaseline1 year2 yearsp value
Height (cm)34153.6 (12.5)160.1 (13.1)‡165.5 (12.7)§<0.01¶
Weight (kg)3447.3 (13.8)53.7 (15.7)‡59.4 (17.1)§<0.01
Body mass index3419.7 (3.7)20.6 (4.0)‡21.4 (4.8)§<0.01¶
Single hop test, LSI (%)2990.8 (15.6)96.7 (14.6)‡95.1 (13.1)0.04¶
Triple crossover test, LSI (%)2893.4 (10.1)96.5 (12.8)93.4 (11.7)0.63¶
Triple hop test, LSI (%)2892.9 (10.4)95.6 (11.0)95.6 (8.7)0.57¶
6 m timed hop test (%)2894.2 (9.6)97.8 (9.4)95.1 (9.5)‡0.01¶
Quadriceps muscle strength ((nm/kg)×100)30195.5 (44.9)205.4 (43.0)224.0 (57.1)§<0.01
Hamstring muscle strength ((nm/kg)×100)30103.8 (24.3)113.8 (28.5)125.0 (32.5)§<0.01
Quadriceps muscle strength, LSI (%)3090.0 (13.1)94.0 (10.3)94.5 (11.8)0.21
Hamstring muscle strength, LSI (%)3094.8 (20.3)94.1 (13.4)92.7 (11.5)0.81
KOS-ADLS2989.0 (10.6)91.0 (9.9)88.4 (14.5)0.89¶
Visual analogue scale2877.5 (16.4)84.9 (16.7)85.3 (18.0)0.11¶
IKDC20002882.7 (10.5)87.2 (10.1)82.9 (17.6)0.71¶
KOOS pain2890.4 (9.5)92.0 (8.7)89.6 (13.1)0.60¶
KOOS symptom2885.1 (15.0)87.0 (11.5)86.3 (10.9)0.73
KOOS activities of daily living2897.9 (4.8)98.9 (2.5)‡95.8 (9.8)§0.02¶
KOOS sport and recreation2883.9 (19.5)85.7 (19.7)79.1 (23.7)0.16¶
KOOS quality of life2866.9 (21.3)75.0 (18.5)70.3 (22.8)0.15
  • *Tests are analysis of variance with repeated measures unless otherwise specified.

  • †Values are given as mean (SD).

  • ‡Significantly different from baseline.

  • §Significantly different from 1 year.

  • ¶Friedman test as data not normally distributed.

  • IKDC2000, International Knee Documentation Committee 2000; KOOS, Knee injury and Osteoarthritis Outcome Score; KOS-ADLS, Knee Outcome Survey Activities of Daily Living; LSI, leg symmetry indices; SD, standard deviation.