“…In most studies tht speified, non-working dults were exluded from nlyses or treted seprtely 56,59,64,65 . This is potentil limittion given tht severl studies inluded smples with oth young nd older dults who re more likely to e students nd retired respetively 46,47,56,59,62,64 . Therefore, the proportion of non-working dults is likely to hve een higher in these studies.…”