Family Support, Communication with Parents, and Adolescent Health Risk Behaviour: A Case of HBSC Study from Bulgaria and Lithuania

<i>Objective:</i> This study aimed to explore the association between adolescents' health risk behaviours (excessive use of alcohol, (e)cigarette smoking, cannabis use) and familial factors. A special objective of this study was to compare findings between Bulgarian and Lithuanian adolescents aged 15 years. <i>Material and Methods:</i> National samples from the WHO Health Behaviour in School-aged Children (HBSC) survey in 2021/2022 were analysed. The focus was on adolescents aged 15 (<i>n</i> = 64,349), including those from Bulgaria (<i>n</i> = 793) and Lithuania (<i>n</i> = 1137). The set of outcome variables included drunkenness, smoked cigarettes, e-cigarettes, and used cannabis (all variables were measured during the last 30 days); their indicators were child's talking separately to their father and separately to their mother, as well as the four-item family support scale. All variables were dichotomised and their associations were analysed using Structural Equation Modelling with a WLSMV estimator. <i>Results:</i> In the total sample, the prevalence of drunkenness was 14.9%, cigarette smoking at 12.6%, e-cigarette smoking at 18.4%, and cannabis use at 5.9%; while in Bulgaria, in contrast to Lithuania, these behaviours were much more prevalent, at 27.0%, 29.9%, 29.8%, and 11.1%, respectively. The use of substances was significantly associated with selected familial factors, which were more pronounced among girls than boys in most subsamples. Low family support showed the strongest association with increased substance use (in the total sample, regression weight B varied from 0.231 to 0.382). Adolescents' difficulty in talking to mother was more pronounced (B = 0.123 to 0.204) than difficulty in talking to their father (B = 0.058 to 0.140). Comparison of data samples from Bulgaria and Lithuania showed stronger relationships in Bulgarian adolescents compared to other countries, which are more pronounced among boys. In addition, among Bulgarian adolescents, easy communication with their father had an inverse association (increasing prevalence) with cannabis use. <i>Conclusions:</i> Adolescent health risk behaviours, such as use of substances, are associated with familial factors, including parent-teen communication and family support. Generally, these associations are more pronounced among girls than boys, and more evident among Bulgarian adolescents than their Lithuanian counterparts. Identifying environmental factors in families helps to plan interventions to prevent development of multiple health risk behaviours in adolescents.