Researchers of a matched cohort study using a Japanese administrative claims database evaluated traumatic injury and fracture risk in early-onset Parkinson’s disease (EOPD), defined as PD diagnosed between ages 21 to 49 with initiation of anti-PD medication. Researchers compared 368 patients with EOPD, with 1,586 matched individuals from the general population, estimating crude incidence rates and adjusted hazard ratios (aHRs) via Poisson and Cox models, with subgroup analyses by age and sex. Outcomes were identified using diagnostic codes and medication records, enabling incidence estimates per 100 person-years.
Overall traumatic injury rates were slightly higher in EOPD (9.5 vs 7.9 per 100 person-years), but the difference was not substantial (aHR 1.2; 95% CI, 0.9–1.5). Fracture risk was similar across groups (1.4 per 100 person-years; aHR 0.9; 95% CI, 0.5–1.6). Subgroup analyses suggested elevated traumatic injury risk in patients with EOPD aged 40 to 49 years (aHR 1.4; 95% CI, 1.0–1.8) and in women (aHR 1.3; 95% CI, 1.0–1.8). Confidence intervals bordering 1.0 indicate these subgroup signals are modest and warrant confirmation. The authors note limitations typical of claims data—limited clinical detail and a relatively small EOPD sample that may reduce power. They conclude that while overall risks are comparable to the general population, targeted prevention (balance/strength training, fall-proofing the home, bone health assessment) may be prudent for women and those aged 40 to 49.
Reference: Akaike T, Fukasawa T, Nakanishi E, et al. Risk of Traumatic Injury in Patients With Early-Onset Parkinson’s Disease: A Population-Based Matched Cohort Study. Parkinsons Dis. 2025;2025:6970763. doi: 10.1155/padi/6970763.
Link: https://onlinelibrary.wiley.com/doi/10.1155/padi/6970763
