Jag har skrivit om en liknande studie tidigare, och nu visar en tysk studie (pdf), refererad av Science Daily, att sambandet gäller även tyska ungdomar:
The quality of life is lower in obese adolescents. However, this correlates to a large extent with self-evaluation. If adolescents think they are "far too fat," they forfeit a lot of their quality of life, whatever their actual weight. This is particularly marked with girls. On the other hand, if they consider their weight "just right," their quality of life is the same as if they were of normal weight, even if this is not true. The proportion of adolescents who think they are overweight has been increasing more rapidly in recent years than the proportion of those who really are overweight.