Morphological Diversity of Pretibial Myxedema and Its Mechanism of Evolving Process and Outcome: A Retrospective Study of 216 Cases

Table 5

Comparison of TRAb titers between before and after therapy, remission and relapse, and recurred and nonrecurred cases.

TRAb variables	Group 1	Group 2	Statistical test	value
	Before therapy	After therapy
Number	125	125
Mean ( ± SD IU/L)	140.83 ± 182.12	73.55 ± 94.51	Paired test = 5.21	0.000
Range (min-max IU/L)	1.87–1186.2	1.13–585.69
TRAb titer distribution
<20 IU/L (no.)	12	37	Pearson chi-square = 19.225	0.000
20–40 IU/L (no.)	34	36
40–100 IU/L (no.)	27	22
>100 IU/L (no.)	52	30
	Remission	Relapse
Number (65 times of 42 cases)	65	65
Mean ( ± SD IU/L)	71.454 ± 78.473	132.146 ± 162.803	Paired test = 4.876	0.000
Range (min–max IU/L)	9.4–351.8	19.8–840
	Nonrecurred cases	Recurred cases
No.	67	65
Mean ( ± SD IU/L)	22.76 ± 14.577	132.146 ± 162.803	Independent test = 5.477	0.000
Range (min–max IU/L)	0.5–60.8	19.8–840