Table 6. Distribution (number/percentage (%)) of the CT examinations in terms of entire lung fissure (ELF) integrity and COPD severity.

Integrity of FEL	Non-COPD	GOLD-I	GOLD-II	GOLD-III	GOLD-IV	All Groups
[0, 20%]	0/0%	0/0%	0/0%	0/0%	0/0%	0/0%
(20%, 40%]	1/0.5%	0/0%	2/1.4%	0/0%	0/0%	3/0.5%
(40%, 60%]	13/5.9%	3/3.6%	6/4.3%	3/4.8%	3/4.7%	28/4.9%
(60%, 80%]	100/45.0%	36/43.4%	59/41.8%	27/42.9%	33/51.6%	255/44.5%
(80%, 90%]	82/36.9%	38/45.8%	60/41.6%	24/38.1%	26/40.6%	230/40.1%
(90%, 100%]	26/11.7%	6/7.2%	14/9.9%	9/14.2%	2/3.1%	57/10.0%