Fig 2.

Percent with cognitive impairment among older patients with breast cancer and noncancer controls by comorbidity level. Comorbidity categorized based on overall median. High comorbidity defined as ≥ two comorbid illnesses; low defined as < two illnesses. Impairment rates based on ≥ one domain score two standard deviations (SDs) below control mean or two domain scores 1.5 SDs below control mean. Figure shows unadjusted rates of impairment. Overall comparison between all patient cases and controls significant at P < .001. Among all patient cases, association between impairment and comorbidity significant at P < .001, whereas control difference not significant (P = .98).