| Summary: | Ruopeng An,1 Peizhong Peter Wang,2 1Department of Kinesiology and Community Health, College of Applied Health Sciences, University of Illinois at Urbana-Champaign, Champaign, IL, USA; 2Faculty of Medicine, Memorial University of Newfoundland, St. John’s, NL, Canada Purpose: In this study, we examined the length of stay, hospitalization cost, and risk of in-hospital mortality among US adult inpatients with immune thrombocytopenic purpura (ITP). Methods: We analyzed nationally representative data obtained from Nationwide/National Inpatient Sample database of discharges from 2006 to 2012. Results: In the US, there were an estimated 296,870 (95% confidence interval [CI]: 284,831–308,909) patient discharges recorded for ITP from 2006 to 2012, during which ITP-related hospitalizations had increased steadily by nearly 30%. The average length of stay for an ITP-related hospitalization was found to be 6.02 days (95% CI: 5.93–6.10), which is 28% higher than that of the overall US discharge population (4.70 days, 95% CI: 4.66–4.74). The average cost of ITP-related hospitalizations was found to be US$16,594 (95% CI: US$16,257–US$16,931), which is 48% higher than that of the overall US discharge population (US$11,200; 95% CI: US$11,033–US$11,368). Gender- and age-adjusted mortality risk in inpatients with ITP was 22% (95% CI: 19%–24%) higher than that of the overall US discharge population. Across diagnosis related groups, length of stay for ITP-related hospitalizations was longest for septicemia (7.97 days, 95% CI: 7.55–8.39) and splenectomy (7.40 days, 95% CI: 6.94–7.86). Splenectomy (US$25,262; 95% CI: US$24,044–US$26,481) and septicemia (US$18,430; 95% CI: US$17,353–US$19,507) were associated with the highest cost of hospitalization. The prevalence of mortality in ITP-related hospitalizations was highest for septicemia (11.11%, 95% CI: 9.60%–12.63%) and intracranial hemorrhage (9.71%, 95% CI: 7.65%–11.77%). Conclusion: Inpatients with ITP had longer hospital stay, bore higher costs, and faced greater risk of mortality than the overall US discharge population. Keywords: hospitalization, inpatient, cost, mortality, length of stay, immune thrombocytopenic purpura, national inpatient sample
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