THITIMON LACHAEKU; KAMONLUK THONGROD; CHUNTISA KAEWKUDSIN; CHANYANUT SITNOI; PHUTWADEE KHUNPIROM; SUPHATTRA ATTHAWAN; AUBONRATCHA KITWANG; AREEYARIN CHUMROCNRUCN; PROMMA, N. Factors influencing substance-use intentions among undergraduate students in northern Thailand: insights from the theory of reasoned action: 10.55131/jphd/2026/240115. Journal of Public Health and Development, Bangkok, Thailand, v. 24, n. 1, p. 200–214, 2026. DOI: 10.55131/jphd/2026/240115. Disponível em: https://he01.tci-thaijo.org/index.php/AIHD-MU/article/view/277745. Acesso em: 1 oct. 2026.