Table 3 Results of the chi-squared and p-for-trend analyses of the associations between each baseline contracture and the location of a second contracture during follow-up at each level I to V of the Gross Motor Function Classification System (GMFCS) for legs that developed > 1 lower limb contracture. Only legs with one single baseline and one single follow up contracture were included
First contracture | GMFCS level | Legs N | Second contracture | p value | ||
|---|---|---|---|---|---|---|
Hip N (%) | Knee N (%) | Ankle N(%) | ||||
Hip joint | 0.002a | |||||
I | 8 | – | 5 (63) | 3 (37) | < 0.001b | |
II | 21 | – | 10 (48) | 11 (52) | ||
III | 19 | – | 12 (63) | 7 (37) | ||
IV | 28 | – | 22 (79) | 6 (21) | ||
V | 45 | – | 40 (89) | 5 (11) | ||
Total | 121 | – | 89 (74) | 32 (26) | ||
Knee joint | 0.003a | |||||
I | 15 | 4 (27) | – | 11 (73) | < 0.001b | |
II | 32 | 7 (22) | – | 25 (78) | ||
III | 54 | 25 (46) | – | 29 (54) | ||
IV | 80 | 36 (45) | – | 44 (55) | ||
V | 111 | 65 (59) | – | 46 (41) | ||
Total | 292 | 137 (47) | – | 155 (53) | ||
Ankle joint | < 0.001a | |||||
I | 18 | 3 (17) | 15 (83) | – | 0.59b | |
II | 30 | 10 (33) | 20 (67) | – | ||
III | 20 | 3 (15) | 17 (85) | – | ||
IV | 40 | 7 (17) | 33 (83) | – | ||
V | 43 | 9 (21) | 34 (79) | – | ||
Total | 151 | 32 (21) | 119 (79) | – | ||