1. Characteristics of dietary interventions, outcomes, and length of follow‐up.

Author and date	Personnel providing dietary intervention	Description of intervention	Method of dietary assessment	Frequency of contact	Outcomes recorded	Follow‐up length	Nutritional status at recruitment	Behavioural change therapy	Control or comparison group
Befort 2016	Registered dietitian or psychologist	Phase 1: 25‐week 60‐minute conference call sessions delivered to groups of 12 to 15 women. Phase 2: 26 biweekly conference calls	Not reported	Weekly	Anthropometry changes, participant costs, incremental cost‐effectiveness	18 months	Not reported	Not reported	Provided 9 newsletters with the same content as intervention calls
Bloom 2008	Trained healthcare professional	Three 6‐hour group workshops	Fruit and vegetable and fat screener questionnaires	Monthly	QoL, knowledge, dietary changes	6 months	Not reported	Not reported	Usual care
Bourke 2011	Exercise physiologist	Nutrition advice pack and healthy eating seminars with supervised home‐based exercise sessions	3‐Day food diary	Weekly	QoL, dietary and anthropometry changes	12 weeks	Not reported	Not reported	Usual care
Demark‐Wahnefried 2006	Dietitian/ counsellors	Personalised workbook of diet and physical activity targets given on the basis of individual intake. Supported by telephone counselling	3‐Day diet recall	12 bimonthly 20‐ to 30‐minute sessions over 6 months	Anthropometry, physical function, diet quality	6 months and 12 months	Nil	Transtheoretical model, social‐cognitive theory	General written material
Demark‐Wahnefried 2007	Mail‐based	Tailored mailed dietary material on increasing fruits and vegetables, reducing total fat, increasing exercise, providing lifestyle advice	Telephone interviews using diet history questionnaire	7 newsletters at 6‐weekly intervals	Anthropometry, behaviour and dietary change, QoL	1 year & 2 years	Not reported	Transtheoretical model, social‐cognitive theory	General written material
Demark‐Wahnefried 2014	Not reported	Personalized workbook with goal‐setting. Advice on specific dietary intake and physical activity	24‐Hour recall	Telephone interviews at 3 time points	Dietary intake, anthropometry, QoL	12 months	BMI ≥ 25 to 39.9	Social‐cognitive theory	Written material
Djuric 2002	Dietitian	Individualised counselling via telephone contact provided	3‐Day food diary	Counselling: weekly for first 3 months, biweekly for months 3 to 6, then monthly up to 30 months	Dietary intake, anthropometry	12 months	Not reported	Social‐cognitive theory	Written materials
Djuric 2002	Weight watchers groups	Weight watchers meetings only	3‐Day food diary	Weekly	Anthropometry and dietary changes	12 months	Not reported	Not reported	Written materials
Ghavami 2017	Researcher but not specified	Individualised intervention promoting prescribed exercise (moderate exercise 3 to 5 days per week) and a balanced diet through stage‐matched telephone counselling and a workbook	Not reported	Weekly	QoL	24 weeks	BMI > 25	Not reported	Usual care
Greenlee 2013	Staff trained under the CURVE programme	Group weight loss programme	Food frequency questionnaire 110‐item	3‐ to 5‐day/week exercise 1‐hour nutrition course/week	Anthropometry, metabolic and dietary changes	12 months	BMI ≥ 25	Not reported	Waiting list
Greenlee 2015	Registered dietitian, nutritionist, chef	9 group sessions (24 hours over 12 weeks) of nutrition intervention with culturally tailored curriculum	24‐Hour dietary recall	Weekly/ monthly	Anthropometry, dietary changes	12 months	BMI 30.6	Social‐cognitive theory, transtheoretical model	Booklets on healthy eating
Gruenigen 2012	Dietitian	Individualised goal‐setting enabling self‐efficacy. Group sessions for nutrition and physical activity advice plus face‐to‐face counselling sessions	24‐Hour recall	10 weekly sessions followed by 6 biweekly sessions plus face‐to‐face counselling	Anthropometry and dietary changes	12 months	BMI 25.0 to 39.9 vs > 40 in control	Social‐cognitive theory	Written material
Harrigan 2016	Registered dietitian	In‐person counselling about nutrition, expertise, behaviour strategies	Food frequency questionnaire	Once per week (for month), then every second week (for months 2 and 3), then once per month (for months 4 to 6)	Anthropometry, dietary changes, biochemical changes, physical activity	6 months	BMI 33.5 vs 34 in control	Social‐cognitive theory
Harrigan 2016	Registered dietitian	Telephone counselling about nutrition, expertise, behaviour strategies	Food frequency questionnaire	Once per week (for month), then every second week (for months 2 and 3), then once per month (for months 4 to 6)	Anthropometry, dietary changes, biochemical changes, physical activity	6 months	BMI 31.8	Social‐cognitive theory
Hawkes 2013	Health coach	Telephone health coaching focused on physical activity, weight management, dietary habits, smoking	Food frequency questionnaire	11 phone sessions over 6 months	Anthropometry, dietary changes, QoL	6 months	BMI ≥ 25	Acceptance commitment therapy, mindfulness	Usual care
Kanera 2017	Web‐based	Web‐based self‐management program with modules on diet, physical activity, depression, others	Dutch standard questionnaire on food consumption	4 weeks after diet	Dietary changes, physical activity	12 months	BMI 26.0	Theory of planned behaviour, self‐regulated theory. integrated model of change	Usual care (waiting list)
Kim 2011	Trained nurses	Workbook and individualised prescription for regular exercise and diet 30‐minute telephone calls	3‐Day dietary recall, diet quality tool	Weekly	Dietary changes, Diet Quality Index, QoL, behavioural changes	12 weeks	Not reported	Transtheoretical model	Usual care
Mefferd 2007	Trained research assistant	Group exercise and diet modification sessions using behavioural treatment, weekly phone calls	Food diaries self‐monitored	Weekly sessions followed by once‐monthly sessions, then monthly sessions for 6 months	Anthropometry changes	16 weeks	BMI ≥ 25	Cognitive‐behavioural therapy	Waiting list
Morey 2009	Health counsellor	PersonaIised tailored workbook and series of quarterly newsletters, along with a programme of telephone counselling and automated prompts	24‐Hour dietary recall	Weekly and monthly telephone and counselling sessions over 12 months	Anthropometry changes, functionality	12 months	BMI ≥ 25 and ≤ 40	Transtheoretical model, social‐cognitive theory	Usual care
Park 2016	Mail‐based	Mail‐based lifestyle intervention	Paffenbarger activity questionnaire	Biweekly for 4 months	Dietary changes, feasibility, and adherence	7 months	Not reported	Addressed behavioural skills but no specific therapy reported	Usual care
Pierce 2007	Trained counsellors	Telephone counselling. Phase 1: build self‐efficacy to implement dietary targets. Phase 2: focus on self‐monitoring and barriers to adherence. Phase 3: focus on motivation 12 cooking classes were offered plus newsletters	24‐Hour dietary recall	Average 18 counselling calls, 12 cooking classes, and 12 study newsletters. By 4 years, average 31 calls and 48 newsletters received	Overall survival, incidence of secondary cancer, comorbidities, anthropometry, dietary changes	4 years	Not reported	Social‐cognitive theory	Writen materials
Reeves 2017	Dietitian	Posted materials and telephone calls	24‐Hour diet recall	Posted materials and up to 16 calls over 6 months	Anthropometry, dietary changes, QoL	6 months	BMI ≥ 25 to 45	Not reported	Usual care
Scott 2013	Trained technician	Individual hypocaloric eating and supervised exercise sessions	3‐Day diet diary	Weekly	Anthropometry, dietary changes, QoL	24 weeks	BMI ≥ 25	Not reported	Written material
Sheppard 2016	Exercise physiologist, nutritionist, survivor coach	Group and individualised phone sessions	4‐Day food diary	Every 2 weeks group session, phone calls on the weeks in between	Anthropometry changes, physiological function, QoL, biochemical changes	12 weeks	BMI ≥ 25 and ≤ 40	Motivational interviewing technique	General health information
Swisher 2015	Dietitian, exercise physiologist	Supervised and unsupervised exercise sessions, 2 individual dietary sessions	3‐Day food diary	3 times/week supervised 2 times unsupervised	Anthropometry changes, physical function, QoL, biochemical changes	12 weeks	BMI ≥ 25	Not reported	Written materials
Yun 2017	Trained health professional	1‐hour health education session, 3‐hour leadership workshop, individual coaching by phone for 24 weeks	Validated questionnaire based on the Rules for National Cancer Prevention: dietary practice guideline	Weekly/monthly for different sessions	Physical activity, dietary changes, QoL, cancer survivors leadership	12 months	BMI 22.05	Transtheoretical model	Usual care
Zick 2017	Registered dietitian	Individualised phone counselling	24‐Hour dietary recall	Weekly for 4 weeks, then biweekly	Anthropometry, dietary changes, QoL, biochemical changes	3 months	BMI 27.2 vs 29.2	Brandura's social‐cognitive theory	General health curriculum sessions