Table 3.

Coding structure of narratives of DATC participants.

Themes	Subthemes
Intrinsic motivation: Competence	Reasons for taking drugs: →Lack of self-worth/confidence/meaning of life Reasons for quitting drugs: →Regain hope and purpose of life when having concrete life goals →Being able to self-discipline
Intrinsic motivation: Autonomy	Reasons for taking drugs: →More willing to take drugs than quitting drugs Reasons for quitting drugs: →More willing to quit drugs than taking drugs →Having understood the negative consequences of taking drugs (e.g., unattractive appearance, hamper the relationship with significant others such as family and friends)
Intrinsic motivation: Relatedness	Reasons for taking drugs: →Negative emotions (e.g., sad, upset) aroused from the poor relationships (e.g., conflict, lack of communication, generation gap, break-up) with significant others (e.g., parents, spouses) →Drugs as psychological substitutes to seek relief, comfort, and satisfaction →Need for affiliation (e.g., negative peer influence, influence by parents) Reasons for quitting drugs: →Receiving care and support (i.e., intimacy) from the significant others →Achieving psychological/spiritual sustenance from religion and life goals
Extrinsic motivation	Reasons for taking drugs: →Strict/severe parental control and discipline/parental pressure (e.g., loss of freedom) Reasons for quitting drugs: →Strict/severe parental control and discipline/parental pressure