Table 2.

Overall Survival stratified by ILA and TBI with Univariate Cox Model using the subjects without ILA as the reference group

	Median OS (years)	95% CI for the median OS	HR	95% CI for HR	P value*
No ILA (n=3216)	12.93	12.67 – 13.43	-	-	-
TBI-0 ILA without TB (n=93)	11.95	10.03 – NR	1.136	0.857 – 1.505	0.375
TBI-1 ILA with traction bronchiolectasis (n=150)	8.52	7.57 – 9.30	2.178	1.8 – 2.635	<0.0001
TBI-2 ILA with mild/moderate TB (n=118)	7.63	6.09 – 9.10	2.647	2.153 – 3.253	<0.0001
TBI-3 ILA with sever TB/honeycombing (n=17)	5.40	1.85 – 5.98	6.847	4.237 – 11.07	<0.0001

^*From univariable Cox models, in comparison with the control group

CI, confidence interval; ILA, interstitial lung abnormality; NR, not reached; TBI, traction bronchiectasis index; TB, Traction Bronchiectasis