The H&T network may also be interested in this paper, though it relates to England.
www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0050606
Regards,
Jenny
Dr Jennifer Mindell
Clinical senior lecturer
Health and Social Surveys Research Group
Research Department of Epidemiology and Public Health
UCL
1-19 Torrington Place
London WC1E 6BT
Tel. 020 7679 1269
Fax 020 7813 0242