Rounding as an indicator of bias in reported body weight in health surveys.

Due to the higher costs and selection bias of directly measuring weight, the majority of body weight data are based on survey responses. However, these statements are subject to systematic biases of social desirability; therefore, it is important to evaluate the magnitude of bias through indirect indicators such as rounding of weights. Data from seven rounds of the Spanish National Health Survey from 1995 to 2017 were included in the study, with 113,284 subjects.

[Nutrition-related knowledge scarcely leads to any eating habit changes. The case of working-class mothers in Andalusia, Spain].

Many prevention-oriented public health policies consist of informative campaigns. These campaigns are based on the idea that information is the key to changing the practices on the part of the population thinking that, once provided with the necessary information, the subjects would change their living habits to more healthy ones. However, many studies have refuted this belief: There is a major gap between what is known about nutrition and actual everyday eating habits.