Epidemiology of Treatment Resistant Depression in Taiwan

Completed

• Conditions: Depressive Disorder, Treatment-Resistant

• Registration Number: NCT02691520
• Lead Sponsor: Janssen Research & Development, LLC

Brief Summary

The purpose of this study is to assess the epidemiology of Treatment Resistant Depression (TRD) in the nationally insured population in Taiwan including incidence, duration of clinical episodes, and prevalence by age and sex.

Detailed Description

This is a retrospective study of approximately one million subjects randomly selected from an anonymized database National Health Insurance Research Database (NHIRD). Participants aged 18 years or older who have had neither a depression diagnosis nor a dispensing of an antidepressant medication in the last four months of 2004 will enter the study when they receive in 2005 a depression diagnosis and a dispensing of an antidepressant medication within 30 days of each other and will be followed up to 8 years or until they have 4 months with neither a depression diagnosis nor a dispensing of an antidepressant medication. Treatment Resistant Depression (TRD) Incidence, TRD prevalence by age and sex and duration of clinical episodes will be estimated.

Basic Information
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Recruitment & Eligibility
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Study & Design

Study Timeline

• Study Start: 2015-09-29
• Primary Completion: 2016-02-18
• Study Completion: 2016-02-18
• Study First Submitted: 2016-02-22
• Study First Submitted QC: 2016-02-22
• Study First Posted: 2016-02-25
• Status Verified: 2024-10
• Last Update Submitted: 2024-10-24
• Last Update Posted: 2024-10-28

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 8356

Inclusion Criteria

• Participants who have been continuously enrolled in the insurance plan since January 1, 2004 (ignoring breaks of less than 30 days) and have not received an exclusion diagnosis and during the last 4 months of 2004, a) Have not received a diagnosis of depression and b) Have not received a dispensing of an AD medication
• Participants with a diagnosis of a depressive disorder including dysthymic disorder (International Classification of Diseases [ICD]-9 codes 296 depression-related, 300.4, 311) and Major Depressive Disorder (ICD-9 296.2, 296.3) will be followed through December 31, 2013

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Exclusion Criteria

• Participants who receive following diagnosis will be excluded, a) Mania, b) Schizophrenia (ICD-9 codes 295), c) Bipolar disorder (ICD-9 codes 296 bipolar-related), D) Dementia (ICD-9 codes 290 or 294); Note: Major depressive disorder (MDD) with psychotic behavior (ICD 296.24 for single episode, ICD 296.34 for recurrent episode) is not an exclusion

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Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Prevalence Percentage of Participants with Treatment Resistant Depression	Approximately 8 Years
Duration of an episode of Depression	Approximately 8 Years	Time from onset of depression to cessation of depression visits and medications.
Incidence Percentage of Participants with Treatment Resistant Depression	Approximately 8 Years	The percentage of beneficiaries of Taiwan's health insurance plan who developed treatment resistant depression during 2005

Secondary Outcome Measures

Name	Time	Method
Healthcare costs	Approximately 8 Years	Direct healthcare cost associated with depression treatment will be assessed.
Number of Participants With Comorbidities	Approximately 8 Years
Medications used by Participants with Treatment Resistant Depression	Approximately 8 Years