Table 1.

TBI on both first and second round chest CT.

			TB Progression Score / 5-year-interval
			Score 1	Score 2	Score 3	Score 4	Score 5
			Improved	Probably Improved	No change	Probably Progressed	Progressed
			No TB progression group			TB progression group
	TBI	n	(n = 4)	(n = 2)	(n = 130)	(n = 46)	(n = 145)	P value
ILA at baseline	TBI = 3	5	0	0	0	0	5	<0.001†
	TBI = 2	51	0	0	5	10	36
	TBI = 1	65	4	2	22	24	13
	TBI = 0	51	0	0	41	2	8
No ILA at baseline		155	0	0	62	10	83

TB, traction bronchiectasis; TBI, traction bronchiectasis/bronchiolectasis index; ILA, interstitial lung abnormalities.

^†P value is for the comparison among all groups by one-way analysis of variance on ranks.