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Forschungsdatenbank PMU-SQQUID

Radon balneotherapy and physical activity for osteoporosis prevention: a randomized, placebo-controlled intervention study.
Winklmayr, M; Kluge, C; Winklmayr, W; Küchenhoff, H; Steiner, M; Ritter, M; Hartl, A;
Radiat Environ Biophys. 2015; 54(1): 12-36.
Originalarbeiten (Zeitschrift)

PMU-Autor/inn/en

Hartl Arnulf Josef
Ritter Markus
Winklmayr Martina

Abstract

The present study examined whether adolescent friendships dissolve because of characteristics of friends, differences between friends, or both. Participants were 410 adolescents (201 boys, 209 girls; mean age = 13.20 years) who reported a total of 573 reciprocated friendships that originated in the seventh grade. We conducted discrete-time survival analyses, in which peer nominations and teacher ratings collected in Grade 7 predicted the occurrence and timing of friendship dissolution across Grades 8 to 12. Grade 7 individual characteristics were unrelated to friendship stability, but Grade 7 differences in sex, peer acceptance, physical aggression, and school competence predicted subsequent friendship dissolution. The findings suggest that compatibility is a function of similarity between friends rather than the presence or absence of a particular trait. © The Author(s) 2015.


Find related publications in this database (Keywords)

Osteoporosis
Balneotherapy
Exercise
Radon