borderline significantP-value =0.05
Serine and free carnitine (C0) showed a borderline significant inverse association with endometrial cancer risk (OR 1SD : 0.89, 95% CI: 0.79–1.00, P-value =0.05, Perm-Pvalue = 1.00 and OR 1SD : 0.91, 95% CI: 0.81–1.00, P-value =0.07, Perm-Pvalue = 0.82, respectively).