From the article: * Measurement of Physical Activity * Measurement of Dietary Behavior/Healthy Eating Index * Measurement of Smoking Status * Measurement of

From the article: * Measurement of Physical Activity * Measurement of Dietary Behavior/Healthy Eating Index * Measurement of Smoking Status * Measurement of Body Fat Percentage I would say number 4 is a bit odd, since it depends on the other ones. But I guess it is easy to measure.