The association between fracture and short-term adverse health outcomes among children with cerebral palsy

Background

Children with cerebral palsy (CP) have a high risk of fracture; yet, little is known about their post-fracture health outcomes. A fracture is an unplanned event in contrast to surgeries or procedures where there is a pre-operative period to optimize body composition and health and planned post-operative follow-up care. Fractures may be associated with significant outcomes due to the unplannable nature and reactionary care. The objective of this study was to determine if fractures were associated with an increased rate of short-term adverse health outcomes among children with CP, and if these associations were dependent on age.

Methods

This retrospective cohort study used commercial claims from 01/01/2001–12/31/2018. The primary cohort was children 2–18 years old with CP and an incident fracture (CP + Fx). Comparison cohorts were propensity score matched 1:1 to CP + Fx on demographic and health-related indicators: CP without fractures (CPw/oFx); without CP with (w/oCP + Fx) or without (w/oCPw/oFx) a fracture. The incidence rate (IR) and IR ratios (IRR) of 30-day and 31–90-day pneumonia and 90-day emergency department (ED) visit were estimated. Cox regression tested for effect modification by age and sex.

Results

The CP + Fx cohort (n = 1670) had higher IRs of 30-day pneumonia (IRR range, 1.53–4.54) and 90-day ED visit (IRR range, 1.45–2.37) (all P < 0.05), and higher IRs of 31–90-day pneumonia but this did not reach statistical significance (IRR, 1.41 to 2.32, all P > 0.05). Notably, there was evidence of effect modification by age. The rate of 30-day pneumonia became more problematic for CP + Fx with older age relative to comparison cohorts and for 90-day ED visit compared to CPw/oFx. The rate of 90-day ED visit for CP + Fx was more problematic at younger ages compared to w/oCP + Fx.

Conclusions

Fractures among children with CP were associated with an increased rate of short-term pneumonia and ED visit, which was more problematic with older age.