Results. Neuropsychological tests did not reveal any differences in cognitive functionbetween breast cancer patients after chemotherapy and healthy controls. Patients rated their own cognitive functions as improved after six months, and patients, who did not receive adjuvant medical treatment, reached the same level as controls within 6 months.Patients receiving chemotherapy or tamoxifen were up to three times more likely than controls to rate themselves as impaired at six months. Conclusion.Our results do not support that adjuvant chemotherapy is associated with cognitive side effects in breast cancer patients.

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