1. Comparison of study interventions for included RCTs.

Reference	Population	CVD risk category	Is intervention delivered to Individual or group?	intervention given by?	Face‐to‐face or other?	Number of visits	Is intervention advice only or other intervention?
Black 1994	People with non‐melanoma skin cancer	Low	Unclear	Dietitian	Face‐to‐face	8 x weekly classes then monthly follow‐up sessions	Advice (behaviour techniques learning)
DART 1989	Men recovering from a MI	High	Individual	Dietitian	Face‐to‐face	9	Advice (diet advice, recipes and encouragement)
Houtsmuller 1979	Adults with newly‐diagnosed diabetes	Moderate	Unclear	Dietitian	Unclear	Unclear	Advice?
Ley 2004	People with impaired glucose intolerance or high normal blood glucose	Moderate	Small group	Unclear	Face‐to‐face	Monthly meetings	Advice (education, personal goal‐setting, self‐monitoring)
Moy 2001	Middle‐aged siblings of people with early CHD, with at least 1 CVD risk factor	Moderate	Individual	Trained nurse	Face‐to‐face	6 ‐ 8 weekly for 2 years	Advice (individualised counselling sessions)
MRC 1968	Free‐living men who have survived a 1st MI	High	Individual	Dietitian	Face‐to‐face	Unclear	Advice and supplement (soy oil)
Oslo Diet‐Heart 1966	Men with previous MI	High	Individual	Dietitian	Face‐to‐face and other	Unclear	Advice and supplement (food)
Oxford Retinopathy 1978	Newly‐diagnosed non‐insulin‐dependent diabetics	Moderate	Individual	Diabetes dietitian	Face‐to‐face	After 1 month then at 3‐month intervals	Advice
Rose corn oil 1965	Men (?) with angina or following MI	High	Unclear	Unclear	Unclear	Follow‐up clinic monthly, then every 2 months	Advice and supplement (oil)
Rose olive 1965	Men (?) with angina or following MI	High	Unclear	Unclear	Unclear	Follow‐up clinic monthly, then every 2 months	Advice and supplement (oil)
Simon 1997	Women with a high risk of breast cancer	Low	Individual followed by individual or group	Dietitian	Face‐to‐face	Bi‐weekly over 3 months followed by monthly	Advice (individualised eating plan and counselling sessions)
STARS 1992	Men with angina referred for angiography	High	Individual	Dietitian	Face‐to‐face	Clinic visits at 3‐month intervals	Advice
Sydney Diet‐Heart 1978	Men with angina referred for angiography	High	Individual	Unclear	Face‐to‐face	3 times in 1st year and twice annually thereafter	Advice
Veterans Admin 1969	Men living at the Veterans Administration Center	Low	Individual	Unclear (whole diet provided)	N/A	N/A	Diet provided
WHI 2006	Postmenopausal women aged 50 ‐ 79 with or without CVD at baseline	Low and High	Group	Nutritionists	Face‐to‐face	18 sessions/1st yr and quarterly maintenance sessions after	Advice
WINS 2006	Women with localised resected breast cancer	Low	Individual followed by group	Dietitian	Face‐to‐face	8 bi‐weekly sessions, then 3‐monthly contact and optional monthly sessions	Advice

MI: myocardial infarction
N/A: not applicable