| Source | Country | N. subjects | Age, mean (SD); year | Intervention | Control intervention | Dietary Co-intervention | Frequency (sessions/week) | Session duration (min) | Program duration (months) | Dropouts, % | Outcomes assessed |
| Batik et al., 2008 [19] | USA | 14 | 73.6 (7.9) | Telephone delivered motivational program focused on increasing physical activity levels | Not present | No | Not reported | Not reported | 6 | Not reported | Physical activity levels; HbA1c |
| Belalcazar et al., 2010 [20] | USA | 1759 | 57.5 (5.1) | Group and individual counselling on physical activity and reductions of fat intake | Group sessions focused on diet, physical activity and social support | Yes | 1 session for week in the first 6 months and 3 sessions per month in the subsequent 6 months in the intervention group 3 sessions per year in the control group | Not reported | 12 | 3.2 | High sensitive C-reactive protein; weight; BMI; waist circumference; fasting blood glucose; HbA1c; LDL cholesterol; Triglycerides; HDL cholesterol; physical fitness |
| Christian et al., 2008 [21] | USA | 310 | 53.2 (11.0) | Individualized tailored report to improve physical activity and dietary lifestyle; planning guide to achieve healthy lifestyle; a counselling visit with the physicians about dietary and physical activity changes | Health education printed material | Yes | 1 session with the physician every 3 months | Not reported | 12 | 9.1 Intervention group, 14.8 control group | Physical activity levels; weight; serum lipids; HbA1c; caloric intake; blood pressure; waist circumference |
| De Greef et al., 2011 [22] | Belgium | 67 | 67.4 (9.3) | (i) Pedometer and diary to record daily physical activity; group physical activity counselling delivered by a behavioral expert (ii) Pedometer and diary to record daily physical activity; individual physical activity counselling delivered by th GP | General care from GP | No | 1 session every 3 weeks | (i) 90 (ii) 15 | 3 | 4.7 group counselling, 8.3 control group | Pedometer-based physical activity; self-reported physical activity; waist circumference, BMI, HbA1c; fasting glucose; total cholesterol |
| Debussche et al., 2012 [23] | Reunion Island | 398 | 53.8 (11.5) | Counselling visits with a nurse and a dietitian | One visit | Yes | 1 session every 3 months | Not reported | 12 | 26 intervention group; 14 control group | HbA1c; BMI; waist circumference; fat mass; blood pressure; treatment; diet; physical activity; fasting blood glucose; lipid profile |
| Di Loreto et al., 2003 [14] | Italy | 340 | 61.8 (0.8) | Counseling for diet and physical activity and therapeutic prescription; structured counseling recommending physical activity | Counseling for diet and physical activity and therapeutic prescription | Yes, for overweight and obese patients | 1 session every 3 months, and one phone calls after the first month | 15 | 24 | 1.6 intervention group | Physical activity level; BMI; HbA1c |
| Eakin et al., 2010 [24] | Australia | 434 | 58.2 (11.8) | Telephone counselling focused on physical activity and healthy diet; workbook of the activities and pedometer | Usual care | Yes | Not reported | 18 | 12 | 21.4 | Physical activity; % of calories from total fat and saturated fat; grams of fiber per day; servings of fruit and vegetables per day |
| Eakin et al., 2009 [25] | Australia | 434 | 58.2 (11.8) | Telephone counselling focused on physical activity and healthy diet; workbook of the activities and pedometer | Usual care | Yes | Not reported | Not reported | 12 | 21.4 | Physical activity; % of calories from total fat and saturated fat; grams of fiber per day; servings of fruit and vegetables per day |
| Eakin et al., 2014 [26] | Australia | 302 | 58.0 (8.6) | Telephone counselling focused on physical activity and reducing energy intake; workbook of the activities | Usual care | Yes | 1 session a week in the first month; 1 session every 2 weeks for the subsequent 5 months; 1 session every month for the next 12 months | Not reported | 18 | 26.5 intervention group; 20.5 usual care group | Weight loss; physical activity; HbA1c; energy intake; diet quality; waist circumference; total cholesterol; HDL cholesterol; LDL cholesterol; Total (HDL cholesterol; triglycerides; systolic and diastolic blood pressure |