Question

A study is planned to compare two weight loss programs in patients who are obese. The first program is based on restricted caloric intake and the second is based on specific food combinations. The study will involve twenty participants and each participant will follow each program. The programs will be assigned in random order (i.e., some participants will first follow the restricted calorie diet and then follow the food combination diet, while others will first follow the food combination diet and then follow the restricted calorie diet). The number of pounds lost will be compared between diets. Identify the type of study design proposed:

Case-control

Cohort

None of the provided

Cross-sectional

Randomized cross-over NEED HELP ANSWERING

Answer 1

this study is cross over trial.

the strength includes the ability to use each participant as his own control therefore there is no issue of use of comparability between the groups in term of other characteristics. another issue with cross over trials is loss to follow up.if a participants drops out of the study on his second diet, the information in the first diet is not usable. thus investigator must do everything to minimize the drop out.