A Study of IL-1β, MMP-3, TGF-β1, and GDF5 Polymorphisms and Their Association with Primary Frozen Shoulder in a Chinese Han Population

Table 4

Comparison between serum IL-1β level in patients with PFS and controls.

Group		Levels of IL-1β; (pg/mL)	value
Cases	42	28.55 ± 2.58	<0.001
Controls	50	20.12 ± 2.28

PFS: primary frozen shoulder.