A number of non-infectious causes may also result in diarrhea including: hyperthyroidism, lactose intolerance, inflammatory bowel disease, a number of medications, and irritable bowel syndrome among other.
It is impossible to correlate this classification with clinical symptoms, in particular milk stasis, non-infectious and infectious inflammation can be distinguished only by leukocyte count and bacteria culturing.
Being overweight as a child has become an increasingly important indicator for later development of obesity and non-infectious diseases such as heart disease.