The parameters for calculating the burden of schizophrenia in Thailand

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Patanon Kwansanit
Manit Srisurapanont

Abstract

          Objective  To review and evaluate the parameters needed for the calculation of burden of schizophrenia in Thailand.
          Material and method  A review utilizing data from PubMed, Embase and PsycINFO using specific keywords to extract relevant data and parameters was done. The selected studies were published between 1990-2017, in both English and Thai. The abstracts were screened, and the full text papers were systematically reviewed and synthesizing according to each subtopic.
          Results  Lifetime and one-month prevalence of schizophrenia in Thailand in 2013 was 0.7% and 0.6% for acute and residual phase respectively. The trend of prevalence is stable and slightly decreased since the first survey in 1998. The severity distribution for the acute phase was 63%, and the residual phase was 37%. The age of onset was 20 years old in male and 24 years old in female. The disability duration until remission was 15.62±11.1 years and 8.28±8.51 years in treatment and un-treatment groups respectively. The relapse rate for second and third episode within five years was 81.9% (95% CI; 70.6-93.2), and 78.0% (95% CI; 46.5-100.0) and remission rate was 1.37. The relative risk of mortality (RRM) was 1.1. The disability weight was 0.756 (0.571-0.894) for acute and 0.576
(0.399-0.756) residual phase, respectively.
          Conclusion  Appropriate parameter for estimation of the burden of schizophrenia in Thailand is the current prevalence. More studies are needed to evaluate other epidemiological parameters that have not been studied in Thailand, i.e. age of onset, duration of illness, relapse and remission rate and the
disability weight which are specific to Thailand.

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