Low body weight is a strong risk factor for tuberculosis as this population-based study from Norway shows.
The body mass index is the most simple and useful indicator to assess the weight of a person. It is calculated by dividing the body weight (in kilogram) by the square of the height (in meters). A body mass index of 30 or more is designated as obesity, 25 to less than 30 as overweight, 18 to less than 25 as normal, and less than 18 as underweight.
The association is probably even stronger than this study suggests, as diabetes is inversely correlated with body weight.
