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Frailty has been suggested as a construct for oncologists to consider in treating older cancer patients. Therefore, the authors assessed the potential of creating a deficit‐accumulation frailty index (DAFI) from a largely self‐administered comprehensive geriatric assessment (CGA).

Five hundred patients aged ≥65 years underwent a CGA before receiving chemotherapy. A DAFI was constructed, resulting in a 51‐item scale, and cutoff values were examined for patients in the robust/nonfrail (cutoff value, 0.0 < 0.2), prefrail (cutoff value, 0.2 < 0.35), and frail (cutoff value, ≥ 0.35) groups.

Two hundred and fifty patients (50%) were nonfrail, 197 (39%) were prefrail, and 52 (11%) were frail. Older patients (aged ≥ 80 years) and those who had lower education, were living alone, and had higher stage disease were associated with prefrail/frail status. Prefrail/frail patients were …