Age linked to long-term ITP risk in 910-child cohort

In a retrospective cohort study of 910 children with immune thrombocytopenia (ITP), age was identified as an independent risk factor for progression to persistent or chronic disease, while bleeding severity and glucocorticoid-tapering duration were associated with the initial treatment response. The findings were reported in BMC Pediatrics. The observational design means that the associations do not establish that changing treatment practices would cause better outcomes.

Initial response was defined as a platelet count of at least 30 × 10⁹/L at one month after first-line therapy, together with at least a doubling of the baseline platelet count. Investigators used logistic regression and restricted cubic spline analyses to assess factors associated with initial response and long-term prognosis. The analysis used data on demographics, platelet counts, disease triggers, bleeding grades, glucocorticoid-tapering times, intravenous immunoglobulin status and treatment outcomes.

Two factors were significantly associated with initial response in the model. Glucocorticoid-tapering time had an odds ratio of 0.39 for response, with a 95% confidence interval of 0.16–0.91 and p = 0.03. Bleeding grade 5 had an odds ratio of 0.26, with a 95% confidence interval of 0.11–0.52 and p < 0.001. Both estimates indicate lower odds of meeting the study’s response definition, although the supplied abstract does not provide the underlying tapering-duration distribution or explain how bleeding grade 5 was characterized. The results therefore cannot be used by themselves to quantify how much a change in either factor might alter an individual child’s probability of response.

For long-term prognosis, children aged three years or older had higher odds of the study’s prognostic outcome than younger children, with an odds ratio of 1.83, a 95% confidence interval of 1.18–2.84 and p = 0.007. Age was thus an independent risk factor in the analysis, but the evidence does not establish it as the principal associated factor. Restricted cubic spline analysis detected a nonlinear association between age and progression to persistent or chronic ITP (p = 0.0012), with approximate inflection points at 3.75 and 8 years. In the model, progression risk rose rapidly before 3.75 years, was relatively stable between 3.75 and 8 years, and increased sharply after age eight, indicating particularly high modeled risk among children aged eight years or older.

Neither intravenous immunoglobulin administration nor a glucocorticoid-tapering time of at least seven days was significantly associated with long-term prognosis. For intravenous immunoglobulin, the odds ratio was 0.99, with a 95% confidence interval of 0.65–1.53 and p = 0.98. For tapering lasting at least seven days, the odds ratio was 1.62, with a 95% confidence interval of 0.76–3.43 and p = 0.21. These results do not demonstrate an association either way, and they do not establish that either exposure improves or worsens long-term outcomes. The authors concluded that age-stratified risk management merits clinical consideration and proposed short-course glucocorticoid regimens as a potentially rational alternative for children without severe manifestations or life-threatening bleeding. Because the study was retrospective and did not report a randomized comparison, those proposals cannot be interpreted as proof that a shortened regimen is safe or effective, or as a treatment recommendation on their own.

Subject of Research: Clinical and prognostic factors associated with treatment response and disease progression in pediatric immune thrombocytopenia

Article Title: Initial response and long-term prognostic risk factors in pediatric ITP

Article References: Zhang, L., Qin, J., Huang, L., Wen, X., Liu, H., Guo, Y., Xuan, X., Xu, C., Xiao, L., & Yu, J. (2026). Initial response and long-term prognostic risk factors in pediatric ITP. BMC Pediatrics, 26(1), Article 1039. https://doi.org/10.1186/s12887-026-07572-1

Image Credits: AI Generated

DOI: 10.1186/s12887-026-07572-1

Keywords: pediatric ITP, immune thrombocytopenia, treatment response, disease progression, glucocorticoids, intravenous immunoglobulin, bleeding severity, risk stratification, retrospective cohort, Initial, response, long-term