A randomized controlled trial (RCT) is a type of study that is used to evaluate the effectiveness of a particular intervention. In this case, the intervention being studied is a program designed to reduce post-cessation weight gain.

Post-cessation weight gain is a common problem among people who quit smoking. It is estimated that up to 70% of people who quit smoking gain weight in the first year after quitting. This weight gain can be a major barrier to successful smoking cessation.

The RCT being studied was conducted in the United States and included over 500 participants. The participants were randomly assigned to either an intervention group or a control group. The intervention group received a 12-week program that included weekly group meetings, individual counseling, and access to a smoking cessation website. The control group received only general health information.

At the end of the 12-week program, the results showed that the intervention group had significantly less post-cessation weight gain than the control group. Specifically, the intervention group gained an average of 1.5 kg less than the control group.

These results suggest that the intervention program was effective in reducing post-cessation weight gain. This is an important finding, as it suggests that programs designed to reduce post-cessation weight gain can be effective in helping people quit smoking and maintain a healthy weight.

Further research is needed to determine the long-term effectiveness of this type of intervention. Additionally, it would be useful to explore other interventions that may be effective in reducing post-cessation weight gain.

Overall, this RCT provides evidence that a program designed to reduce post-cessation weight gain can be effective in helping people quit smoking and maintain a healthy weight. This is an important finding that could have implications for smoking cessation programs and public health initiatives.