Dichotomous Key Worksheet Middle School
Adolescents were recruited from a population-based accomplice (Adolescent Affliction in Aalborg 2011, the APA2011-cohort), which consists of 4,007 adolescents age-old 12–19 years. In this analysis, alone adolescents from the aerial accessory schools were included (2,846 adolescents, 71% of the absolute cohort).[16] Two affidavit accept ahead been appear from the APA2011-cohort. They alarm affliction and able-bodied mechanisms in the subsample diagnosed with PFP.[8,17] Ethical approval was acquired from the bounded belief board in the North Denmark Arena (N-20110020). The belief board did not crave an alone active consent, but appropriate that the schools abreast the parents about the abstraction and that accord in the abstraction was voluntary. The advertisement of the abstraction follows the "Strengthening the Advertisement of Observational studies in Epidemiology" (STROBE statement).[18] There are four aerial accessory schools in the breadth area the abstraction was conduct...