Endpoint evaluation
toxicities, erythema, edema
EDEMA, SECONDARY, ERYTHEMA, SKIN TOXICITY
All patients completed a range of questionnaires by interview every week from the start of radiotherapy treatment until four weeks after the completion of radiotherapy. The acute radiation morbidity scoring criteria of radiation therapy oncology group (RTOG) was used to grade provider-assessed toxicities. The primary endpoint was incidence rate of ≥ grade 2 skin toxicity, including tender or bright erythema, patchy moist desquamation and moderate edema [The secondary endpoint of this study was dermatitis-related Qol which was usually evaluated by the Skindex-16 (SD-16) module. SD-16 comprises an analogue scale (0 = never bothered to 6 = always bothered) to categorize patient response, including emotion, symptoms and functioning [