The present study aimed to clarify whether serum Pi, FGF-23, and BAP are independently associated with UACR in non-CKD women, and investigate differences in the origin of the Pi load between pre- and postmenopausal non-CKD women in an attempt to elucidate the relationships among serum FGF-23, BAP, and UACR. The gene discussed is FGF23; the disease is chronic kidney disease.