Factors behind a remarkable increase in adolescent psychiatric inpatient treatment between 1980 and 2010 - a nationwide register study.

We reported an increase in adolescent psychiatric inpatient care from the latter half of the 1990s up to 2010, which could be explained by societal and policy changes. In particular, as the study period progressed a significant increase was seen in admissions of females and a global reduction of length of stay (LOS) with no concomitant increase in re-hospitalizations.