Factor Structures in the Depressive Symptoms Domains in the 9Q for Northern Thai Adults and Their Association with Chronic Diseases.

Most of the common models to examine depression are one-factor models; however, previous studies provided several-factor structure models on each depressive symptom using the Patient Health Questionnaire-9 (PHQ-9). The Nine-Questions Depression-Rating Scale (9Q) is an alternative assessment tool that was developed for assessing the severity of depressive symptoms in Thai adults. This study aimed to examine the factor structure of this tool based on the factor structure models for the PHQ-9 provided in previous studies using confirmatory factor analysis (CFA).

Comparison of unweighted and item response theory-based weighted sum scoring for the Nine-Questions Depression-Rating Scale in the Northern Thai Dialect.

Background: The Nine-Questions Depression-Rating Scale (9Q) has been developed as an alternative assessment tool for assessing the severity of depressive symptoms in Thai adults. The traditional unweighted sum scoring approach does not account for differences in the loadings of the items on the actual severity. Therefore, we developed an Item Response Theory (IRT)-based weighted sum scoring approach to provide a scoring method that is more precise than the unweighted sum score.

Time to relapse and remission of bipolar disorder: findings from a 1-year prospective study in Thailand.

Background And Methods: This study aimed to determine time to relapse and remission of mood episodes in Thai patients with bipolar disorder (BD). The Thai Bipolar Disorder Registry was a multicenter, prospective, naturalistic, observational study conducted in Thailand. Participants were adult inpatients or outpatients with Diagnostic and Statistical Manual of Mental Disorders bipolar disorder.

Patterns of alcohol dependence in Thai drinkers: a differential item functioning analysis of gender and age bias.

In Caucasians, the patterns of alcohol use disorders in women and adolescents are likely to be different from those in men and adults, respectively. The authors examined these differences in a Southeast Asian sample of Thai people living in communities. A two-parameter logistic model of the IRT log-likelihood-ratio (IRTLR) test for differential item functioning (DIF) procedure was used.

Development and validity of two-question screening test for depressive disorders in Northeastern Thai community.

Objectives: (1) To develop a screening test for depressive disorders which is simple and short. (2) To determine the diagnostic accuracy of this screening test in Northeastern Thai community.

Methods: From August 2006 through October 2006, two phases of tool development were conducted.