Table 7

 Costs of interventions

InterventionProvider’s costs (£)Total cost* (£)
Weight Watchers55.0076.87
Slimming World49.5071.37
Rosemary Conley55.0076.87
NHS Size Down70.0091.87
General practice90.86112.73

*Cost per participant recruited includes £10 for call centre, £3.54 for practices to run search of their lists and for general practitioners to screen lists for ineligible participants, and £8.33 for invitation letters sent by practices (£1 per letter, with 12% response rate).