GDF15 and neoplasm: Median baseline GDF-15 level was not related to tumor stage (stage 2 disease: median 373.0 pg/mL (range 197.6–1935.0; n = 30), stage 3&4 disease: median 486.4 pg/mL (range 186.8–1875.9; n = 11); P = 0.40).