Japan: breakdown of drug-dependent patients based on diagnosis 2020

According to a survey conducted from September to October 2020 in Japan, around 65 percent of over 2.7 thousand patients with mental and behavioral disorders related to drug abuse were diagnosed with dependence syndrome. At the same time, about 31 percent of patients treated at psychiatric facilities were diagnosed with residual disorders and late-onset psychotic disorders.

Distribution of patients with drug abuse-related mental and behavioral disorders based on the classification of diagnosis in Japan in 2020

Characteristic	Share of patients
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Release date

March 2021

More information

Region

Japan

Survey time period

September 1 to October 31, 2020

Number of respondents

2,733 patients*

Special properties

multiple answers possible

Method of interview

Postal questionnaire

Supplementary notes

*The survey was conducted among 232 psychiatric facilities across Japan. Attending doctors of 2,733 patients who received inpatient or outpatient treatments at respective facilities responded to the survey question.

Patients were diagnosed with mental and behavioral disorders due to psychoactive substance use, excluding alcohol use, based on the International Classification of Diseases, Tenth Revision (ICD-10-CM) designated by the World Health Organization (WHO.)

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