Purpose: to elaborate the Positive Health Behaviours Scale (PHBS) for use with adolescents and to provide its psychometric analysis.
Methods: the instrument consists of 30 statements comprised of five subscales (nutrition, relaxation and behaviours connected with psychosocial health, safety, taking care of one's body and physical activity) which were measured on a 4-point summated rating scale from 3 (almost always) to 0 (almost never). Psychometric analysis included assessment of reliability (using Cronbach's a coefficient Jöreskog's rho coefficients), theoretical validity (factor analysis) and construct validity (using data concerning perceived health, self-assessment of care of own health, psychoactive substance use and subjective health complaints; four hypothesis were tested) and unidimensionality (principal components).