Fig. 2From: Using Hashimoto thyroiditis as gold standard to determine the upper limit value of thyroid stimulating hormone in a Chinese cohort a The prevalence of HT corresponding to each decile of TSH value (Each point in the chart corresponded to the number labeled in X axis. 2.89 is the cutoff value of TSH revealed by joinpoint analysis). b The joinpoint regression analysis showed only one joinpoint was found. This joinpoint presented in the ninth decile group, and the lower limit value of this group of 2.89 was taken as the cutoffBack to article page