Table 1.
PICOS criteria for inclusion in the systematic review.
| Criteria | |
|---|---|
| P—patient | Women with breast cancer ≥18 years old |
| I—intervention | Radiotherapy |
| C—comparison | Ultrasound assessments of the irradiated skin compared with the contralateral nonirradiated or pre-RT skin measurements |
| O—outcome | Skin toxicity |
| S—the type of study |
Exclusion of studies with no statistical comparisons (case study or case series) or consisting of fewer than 10 patients, as well as reviews, editorials, and non-English or nonhuman studies |
Abbreviations: Pre-RT = pre-radiotherapy.