Physical activity:: NHIS

#1

In the NHIS, for the physical activity variables “MOD10DMIN” and “VIG10DMIN”, does the code"0" correspond to those who are not in the universe or those who did not do any physical activity (0 minutes of physical activity)?

#2

Technically, the code == 0 for MOD10DMIN and VIG10DMIN indicate that an individual is NIU for each of these variables. That being said, written into the universe statements for each of these variables is the criteria that individual’s participate in moderate (vigorous) activities for at least 10 minutes. So, for sample adults who are older than 18 years old, the code == 0 indicates that the individual does not participate in moderate (vigorous) activities for at least 10 minutes.