[Retracted] Effect of Autoimmune Cell Therapy on Immune Cell Content in Patients with COPD: A Randomized Controlled Trial

Table 2

Grouping scheme of COPD patients.

Classification	Characteristics		Lung function classification	Acute exacerbation/year	mMRC	CAT
	Risk level	Symptoms
A	Low	Less	GOLD 1-2	≤1	0-1	<10
B	Low	More	GOLD 1-2	≤1	≥2	≥10
C	High	Less	GOLD 3-4	≥2	0-1	<10
D	High	More	GOLD 3-4	≥2	≥2	≥10