Table 1.

SICAD Classifications of COPD

SICAD class	Features	Number of exacerbations in the past year.	CAT score	Equivalent to GOLD
Class I	Less symptoms, low risk of exacerbation	0-1	≤ 10	Group A
Class II	More symptoms, low risk of exacerbation	0-1	≥ 10	Group B
Class III	High risk of exacerbation	≥ 2	Any score	Group C and D