Weight loss referrals for adults in primary care (WRAP): protocol for a multi-centre randomised controlled trial comparing the clinical and cost-effectiveness of primary care referral to a commercial weight loss provider for 12 weeks, referral for 52 weeks, and a brief self-help intervention [ISRCTN82857232]

Table 1 Schedule of enrolment, interventions, and assessments

	STUDY PERIOD
	Enrollment	Baseline visit	Post allocation		Close-out
TIMEPOINT	-t ₁	0	3 months	12 months	24 months
ENROLMENT:
Eligibility screen	X	X
Informed consent		X
Allocation		X
INTERVENTIONS:
*Brief Intervention*		X
*12 weeks Commercial Programme*		X	X
*52 weeks Commercial Programme*		X	X	X
ASSESSMENTS:
*Height*		X
*Weight*		X	X	X	X
*Fat mass*		X	X	X	X
*Waist Circumference*		X	X	X	X
*Blood Pressure*		X	X	X	X
*Blood Glucose*		X		X
*Lipid Profile*		X		X
*HbA1c*		X		X
*DNA*		X
*Demographics Questionnaire*		X	X	X	X
*Health Care Usage Questionnaire*		X	X	X	X
*EQ5D*		X	X	X	X
*Psychosocial Questionnaires*		X	X	X	X
*Intervention Usage Questionnaires*		X	X	X	X
*Qualitative Interviews (subset only)*			X

ISSN: 1471-2458