This application only uses demographics and physical health to predict GDS-15, that avoids frequently asking an elderly patient the same questions. During regular health visit (e.g. monthly), a healthcare giver may input the existing routine information to this application. Only if the GDS-15 is predicted positive, then the questionnaire is given to confirm further diagnostic procedures. Patients aged 60 years or older in community-health center (or equivalent) are eligible.A patient is unlikely well-predicted if the patient input data are not provided by the input options in this application. The exception is religion due to ethical reason, but, religious believers are likely well-predicted, particularly two of the religion options.
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