Mental health problems among individuals with persistent health challenges from adolescence to young adulthood: a population-based longitudinal study in Norway

BACKGROUND Persistent health challenges are increasing throughout the world. It has been shown that adolescents with persistent health challenges are at greater risk of having mental health problems than their healthy peers. However, these studies are mainly cross-sectional, and little is known about the transition to adulthood. Thus, the aim of this study was to examine how mental health problems in adolescents and young adults with persistent health challenges vary during adolescence and in the transition to young adulthood. METHODS The study used longitudinal and time-series data from the "Young in Norway" study. A sample of adolescents was prospectively followed from adolescence to young adulthood with measures at four different time points (n = 3,087; T1-T4): 2921 adolescents (12-19 years) participated at T1 and T2, while 2448 young adults participated at T3 and T4. Persistent health challenges, age, gender, mental health problems and parental socio-economic status were measured in the longitudinal survey. Regression models were applied to estimate associations between persistent health challenges (understood as having a chronic health condition or disability) and mental health problems during adolescence and young adulthood. Different models were tested for chronic health conditions and disability. RESULTS Adolescents with disability had higher scores for depressive and anxiety symptoms, loneliness and self-concept instability, and lower scores for self-worth, appearance satisfaction, scholastic competence and social acceptance compared with adolescents without disability. In young adulthood, there were also significant associations between disability and most mental health problems. The longitudinal associations between chronic health conditions and mental health problems during adolescence and young adulthood showed that significant associations between chronic health conditions and mental health problems were only found during adolescence. CONCLUSIONS This longitudinal survey revealed that on average, adolescents with disability had more mental health problems than those with a chronic health condition. In addition, the problems followed into adulthood for adolescents with disability. Thus, disability seems to be a much higher risk factor for developing and maintaining mental health problems than having a chronic health condition. These findings need to be followed up in further studies.