The connection of anorexia with various mental diseases and the use of alcohol and narcotics was also studied, but in this context it is not always clear which of these constitutes the cause and which one the effect.
Einnig voru skoðuð tengsl lystarstols við ýmsa geðsjúkdóma og áfengis- og vímuefnanotkun en ekki er alltaf ljóst hvað er orsök og hvað afleiðing.