Is the irradiated small bowel volume still a predictor for acute lower gastrointestinal toxicity during preoperative concurrent chemo-radiotherapy for rectal cancer when using intensity-modulated radiation therapy?

Table 2 Scale for acute GI toxicity based on common toxicity criteria v3.0

Grade	Symptom
0	None
1	Increase of <4 stools per day over pretreatment
2	Increase of 4–6 stools per day or nocturnal stools
3	Increase of ≥7 stools per day or incontinence or need for parenteral support for dehydration
4	Physiologic consequences requiring intensive care of hemodynamic collapse

ISSN: 1748-717X