Table 1.

Baseline characteristics of participants stratified by ILA (Interstitial lung Abnormalities) and TBI (Traction Bronchiectasis Index)

Demographics	No ILA (n=3216)	Subjects with ILA (n=378)
		TBI-0 No TB (n=93)	TBI-1 Bronchiolectasis (n=150)	TBI-2 Mild/moderate TB (n=118*)	TBI-3 Severe TB (n=17)
Age (years)
Median [Range]	75 [66–96]	75 [67–94]	78 [67–92]	79 [69–91]	79 [69–92]
P value†	-	0.966	<0.0001	<0.0001	0.032
Sex
Male	1306	37	87	70	12
Female	1910	56	63	48	5
P value†	-	0.915	<0.0001	<0.0001	0.023
Smoking History
Never	1463	24	51	26	4
Former	1376	45	79	68	10
Current	374	22	20	24	3
Unknown	3	2	0	0	0
P value¶	-	<0.0001	0.006	<0.0001	0.087

^*Include 72 subjects with mild traction bronchiectasis and 46 subjects with moderate traction bronchiectasis

^†P value is for the comparison to the control group.

^¶P value is for the comparison of never and former/current smokers to those in the control group.

ILA, interstitial lung abnormality; TBI, traction bronchiectasis index; TB, Traction Bronchiectasis