Abstract
ImportanceAs evidence continues to accumulate regarding the multi-organ dysfunction associated with Parkinson’s Disease (PD), it is still unclear as to whether PD increases the risk of hematological pathology. ObjectiveTo investigate the association between PD and hematological pathology and relevant risk factors.Design, Setting, and ParticipantsThis retrospective cohort analysis was conducted using 8-years of the National Readmission Database. All individuals diagnosed with PD were queried at the time of primary admission, and all relevant demographic data was collected. Readmissions, complications, and risk factors were analyzed at 30, 90, 180, and 300-day intervals. Statistical analysis included multivariate gaussian-fitted modelling, with age, sex, comorbidities, and discharge weights as covariates. Coefficients of model variables were exponentiated and interpreted as odds ratios. Predictive models were developed using generalized linear modeling. Complications were queried using International Classification of Disease codes.Main Outcomes and MeasuresReadmission for blood transfusion within readmission intervals and potential risk factors for blood transfusion. ResultsAnalysis was with 1,765,800 PD patients (mean age: 76.3±10.4; 44.1% female). Rates of percutaneous blood transfusion in readmitted patients at 30, 90, 180, and 300 days was found to be 8.7%, 8.6%, 8.3%, and 8.3% respectively. At all timepoints, modelling revealed that those with anti-parkinsonism medication side effects at the primary admission had increased rates of gastrointestinal (GI) hemorrhage (average OR: 1.02; 95%CI: 1.01-1.03, p<0.0001) and blood transfusion (average OR: 1.06; 95%CI: 1.05-1.08, p<0.0001) at readmission. PD patients who experienced GI hemorrhage of any etiology, including as a side effect of anti-parkinsonism medication, were found to have significantly higher rates of blood transfusion at all timepoints (average OR: 1.14; 95%CI: 1.13-1.16, p<0.0001). Kaplan-Meier survival analysis and predictive modelling confirmed these findings, with significantly higher rates of blood transfusion seen in PD patients with drug side effects and GI hemorrhage compared to those without.Conclusions and RelevanceOur findings suggest that PD patients may be readmitted at a high rate for blood transfusion procedures. These readmissions were found to be significantly associated with anti-parkinsonism drug side effects and GI hemorrhage of any etiology. Long-term management of PD patients should focus on both neurological and non-neurological complications.