Kaplan-Meier analysis of the effect of a history of TC on BC-specific and overall survivals of patients in various settings.

Abstract

A, comparison of BC-specific survival curves between BC/TC and matched BC-only patients; B, comparison of BC-specific survival curves between BC-1st and matched BC-only patients; C, comparison of overall survival curves between BC-1st and matched BC-only patients. D, comparison of BC-specific survival curves between TC-1st and matched BC-only patients. BC, breast cancer; TC, thyroid cancer; BC-only, patients only with a diagnosis of breast cancer and without a history of thyroid cancer; BC/TC, breast cancer patients also with a history of thyroid cancer diagnosed any time—either before or after the diagnosis of breast cancer; BC-1st, breast cancer was diagnosed first, followed by the diagnosis of thyroid cancer; TC-1st, thyroid cancer was diagnosed first, followed by the diagnosis of breast cancer.</p