Table 1.

Criteria for Determination of Receipt of Non-Guideline-Concordant Care

Subset	Inclusion Criteria	Guideline Treatment a	Definition of Non- Guideline-Concordant Treatment
1	▪ Stage I-III   ▪ Tumor size ≤ 5 cm   ▪ Not having a diagnosis of Paget disease, inflammatory carcinoma, or being diagnosed by mammography only   ▪ Confirmed pathology   ▪ Known lymph node involvement   ▪ No diagnosis of bilateral tumors or a second primary breast tumor within 60 days	▪ Lumpectomy with full-course of radiation   ▪ Mastectomy, with or without radiation	▪ No surgery   ▪ Lumpectomy without radiation   ▪ Lumpectomy with early discontinuation of radiation
2	▪ Estrogen receptor (ER)+ and/or progesterone receptor (PR)+	▪ Endocrine therapy	▪ No endocrine therapy
3	▪ Stage I-III   ▪ Age <70   ▪ ER- and PR-   ▪ Tumor size >= 1cm	▪ Chemotherapy	▪ No chemotherapy

^aDefinitions based on the Comprehensive Cancer Network Clinical Practice Guidelines in Oncology [33] and the American Society of Clinical Oncology Quality Oncology Practice Initiative [35]