What was the average weight change reported in the JAMA March 2010 study after 13 years?

The study published in JAMA in March 2010, which examined changes in weight over a span of 13 years, indicated an average weight gain of 6 lbs among participants. This finding highlights trends in body weight which can be associated with various lifestyle factors, including dietary habits and physical activity levels over time.

Understanding average weight changes is crucial, as they can identify shifts in population health and the effectiveness of public health initiatives. Moreover, a weight gain average suggests that for many individuals, maintaining weight can require conscious effort, especially in the context of factors like aging and lifestyle modifications.

The other potential answers reflect different possible scenarios, but they do not align with the documented findings from this long-term study. This reinforces the importance of relying on empirical data when discussing trends in weight change over extended periods.