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Original ArticleOpen Access
Development of the Thai Depression Inventory
Lotrakul M 
,
Sukanich P
,
Sukanich P The Thai Depression Inventory was developed as a self-rating instrument for measuring
the severity of depression. The items used were based on widely used Western scales and on
common manifestations and idioms of distress among depressed Thai subjects. The scale was
tested with 50 depressed patients using the Hamilton Rating Scale for Depression as an external
standard. The internal reliability and concurrent validity were good (Cronbach alpha = 0.858;
r=0.72). The items of psychomotor retardation and loss of libido were poorly correlated with
the total score. Factor analysis revealed five distinct factors which accounted for 59.8 per cent of
the total variance. Anxiety-insomnia factor was the predominant factor. For major depressive
patients, the Thai Depression Inventory total score is 35 or above. The Thai Depression Inventory
is a culturally appropriate instrument for measuring the severity of depression with satisfactory
reliability and validity.
Key word : Depression, Rating Scale, Thai
the severity of depression. The items used were based on widely used Western scales and on
common manifestations and idioms of distress among depressed Thai subjects. The scale was
tested with 50 depressed patients using the Hamilton Rating Scale for Depression as an external
standard. The internal reliability and concurrent validity were good (Cronbach alpha = 0.858;
r=0.72). The items of psychomotor retardation and loss of libido were poorly correlated with
the total score. Factor analysis revealed five distinct factors which accounted for 59.8 per cent of
the total variance. Anxiety-insomnia factor was the predominant factor. For major depressive
patients, the Thai Depression Inventory total score is 35 or above. The Thai Depression Inventory
is a culturally appropriate instrument for measuring the severity of depression with satisfactory
reliability and validity.
Key word : Depression, Rating Scale, Thai
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