Table 4.

Plasma levels of TGF-β1 in the control group and HD patients.

HD	Number of Measurements	TGF-β1 $\overline{\mathit{X}}$ ± SD	TGF-β1 Average Range
Control group	39	648.69 ± 663.35	0–2096.87
All patients	100	611.34 ± 542.79	0–2096.87
Preclinical	12	711.31 ± 556.99	0–1970.48
Very early	12	602.40 ± 634.34	0–2096.87
Early	23	517.93 ± 453.91	0–1647.37
Intermediate	33	543.87 ± 482.81	0–2096.87
Advanced	20	702.60 ± 423.80	94.26–423.80

$\overline{\mathit{X}}$ ± SD—mean ± standard deviation.