Weight losses should be reported using a range of outcome measures so that the effectiveness of. Systematic search of 3 databases identified 11 randomized controlled trials and 14 observational studies of commercial meal-replacement calorie-counting or pre-packaged meal programs which met inclusion criteria. Pin On Weight Loss Oregon Evidence-based Practice Center Portland OR Investigators. Effectiveness of weight loss programs . And intensive diet and lifestyle programs work well for weight loss. The Jenny Craig regimen generated the greatest weight loss but was also the most expensive option tested according to Eric Finkelstein at Duke-National University of Singapore NUS Graduate Medical School and the Duke. Average weight loss was more than twice as great in the reward arm compared to the control arm at month 4 when the program concluded 34 kg vs 14 kg p 001 month 8 when rewards concluded 33 kg vs 18 kg p 005 and at month 12 23 kg vs 08 kg p 005. A total of 17519 adults enrolled ...