Information on how items for costing were identified
Journal article: Peveler R, Kendrick T, Buxton M, et al, A randomised controlled trial to compare the cost-effectiveness of tricyclic antidepressants, selective serotonin reuptake inhibitors and lofepramine, Health Technology Assessment, 2005, 9
Validation
Journal article: Roberts S H, Bedson E, Hughes D, et al, Folate Augmentation of Treatment – Evaluation for Depression (FolATED): protocol of a randomised controlled trial, BMC Psychiatry , 2007, 7, 7-65 [DOI: 10.1186/1471-244X-7-65]
Reliability testing
Some indication of reliability testing done in AHEAD study but extent of application to questionnaire unclear.
Journal article: Peveler R, Kendrick T, Buxton M, et al, A randomised controlled trial to compare the cost-effectiveness of tricyclic antidepressants, selective serotonin reuptake inhibitors and lofepramine, Health Technology Assessment, 2005, 9
Adaptations
Based on self-report questionnaire for use of health and social services (AHEAD Trial) but has included number of times used ambulance service and NHS Direct as well
