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Prognostic variables in newly diagnosed childhood immune thrombocytopenia
Shahid Ahmed1, Anita K Siddiqui, Rabia K Shahid
1Saskatoon Cancer Center, University of Saskatchewan, Saskatoon, SK, Canada. sahmed@scf.sk.ca
Insights
In childhood Immune Thrombocytopenia (ITP), a low Mean Platelet Volume (MPV) at diagnosis and a history of viral illness predict a favorable outcome. These factors help identify children likely to achieve durable remission quickly.
Area of Science:
- Pediatric Hematology
- Immunology
- Clinical Prognostics
Background:
- Immune thrombocytopenia (ITP) in children typically has a good prognosis, but predicting disease course at diagnosis remains challenging.
- Identifying early prognostic factors is crucial for managing childhood ITP effectively.
Purpose of the Study:
- To identify clinical variables that predict disease course in pediatric patients newly diagnosed with ITP.
- To determine independent prognostic factors for achieving durable remission in childhood ITP.
Main Methods:
- Retrospective evaluation of clinical data from 103 pediatric ITP patients diagnosed between 1995 and 2001.
- Analysis of admission Mean Platelet Volume (MPV), platelet count, history of viral prodrome, age, and sex.
- Univariate and multivariate analyses to identify predictors of durable complete remission (CR).
Main Results:
- A majority of patients (66%) presented with a low admission MPV (<8 fL).
- Low admission MPV (<8 fL) and a history of viral prodrome independently predicted durable CR.
- Low admission MPV showed an odds ratio of 14, and viral prodrome an odds ratio of 8.9 for durable remission.
Conclusions:
- Low admission MPV and a history of viral illness are significant independent prognostic factors for durable remission in childhood ITP.
- These findings can aid in predicting disease outcomes at the time of diagnosis.
- Early identification of prognostic variables improves management strategies for pediatric ITP.
Abstract:
Immune thrombocytopenia (ITP) has a favorable prognosis in children. Only a small number of children go on to develop chronic ITP. However, at the time of diagnosis, it is not possible to predict the course of the disease. In order to determine prognostic factors that could predict the disease course at diagnosis, we retrospectively evaluated various clinical variables in 103 pediatric patients with newly diagnosed ITP at our institution from 1995 to 2001. Sixty-eight (66%) patients had a mean platelet volume (MPV) of <8 fL on admission. Of 72 patients who had a follow-up period of at least 6 months, 54 (75%) achieved a durable remission within 6 months and 18 (25%) developed chronic ITP. In univariate analysis, a low admission MPV (<8), history of viral prodrome, and a low admission platelet count (<10 x 10(9)/L) predicted for a favorable outcome. Age and sex did not correlate with remission. In multivariate analysis, a low admission MPV and a history of a viral prodrome were the only independent factors correlated with a durable CR. The adjusted odds ratio for achieving a durable remission was 8.9 (95% CI: 1.54-51.8) for history of a viral prodrome and 14 (95% CI: 2.52-83.3) for low admission MPV value. In conclusion, our study showed that a majority of the children with newly diagnosed ITP presented with a low MPV value. A history of viral illness and a low admission MPV were found to be independent prognostic variables that predicted for the achievement of a durable CR in childhood ITP.