BackgroundThe Gait Profile Score (GPS) and the Gait Variable Score (GVS) are summary measures used to assess the long-term effects of neuro-orthopedic surgery (NOS) in children with cerebral palsy (cwCP). Research questionWhat are the immediate changes after NOS as assessed by GPS and GVS, and how does GPS variation (ΔGPS) compare to the clinical opinion of the NOS outcome? MethodsProspective single-arm cohort study. CwCP were assessed before NOS and after the first month of weight-bearing. Popliteal angle, ankle passive dorsiflexion (pDF), and spasticity were collected at the bedside. During walking, pain was assessed using NPRS, and speed was obtained from gait analysis data, as well as GPS and GVS. Longitudinal variations were analyzed using the Wilcoxon test. Children were classified as Improved (I), Stable (S), or Worsened (W) according to ΔGPS and the cut-off threshold recommended in literature. Two clinicians independently classified patients either as I, S, or W based on surgical outcome. Agreement between these two classifications was analyzed using Cohen’s k. ResultsTwenty cwCP, 11.4 (3.4) years, were included. At the follow-up: the popliteal angle was reduced by 20° (p=0.015); pDF increased by 10° (p<0.001), and triceps surae spasticity decreased (p=0.008). Pain decreased in four children. GPS decreased from 12.7 (range 8.1–27.7) to 11.8 (7.6–17.6) (ES=0.514, p=0.046), despite a decrease in gait speed (p<0.001). GVS better highlighted the effect of NOS after single-level surgery. Clinically, 18/1/1 children were classified I/S/W. Based on ΔGPS, 9/8/3 children were classified I/S/W. Such disagreement (k=0.119, p=0.227) was mainly due to the different focus of the two assessments. SignificanceFollowing NOS, immediate improvements in walking kinematics were observed.
Read full abstract