Serum transforming growth factor-β1 level reflects disease status in patients with esophageal carcinoma after radiotherapy

Table 2 Changes in serum TGFβ1 levels before and after RT

Groups	n	Mean value (ng/mL)	t value	P value
Control	15	9.53 ± 6.45	5.287	0.001
All patients
Before RT	90	41.13 ± 15.41
After RT	87	36.52 ± 19.26	1.365	0.072
Decreased group
Before RT	59	42.93 ± 14.37
After RT	59	25.98 ± 8.39	2.481	0.006
Increased group
Before RT	28	40.25 ± 16.29
After RT	28	51.61 ± 19.75	1.827	0.039