Table 5. Frequency of various high-resolution CT (HRCT) patterns in patients with rheumatoid arthritis-associated interstitial lung disease (RA-ILD) by age (n=118).

UIP = usual interstitial pneumonia; NSIP = nonspecific interstitial pneumonitis

Age			HRCT Pattern		Total	P-value
			UIP (n=74)	NSIP (n=44)
	<45 years (n=70)		44	26	70	0.969
			62.9%	37.1%	100.0%
	≥45 years (n=48)		30	18	48
			62.5%	37.5%	100.0%
Total			74	44	118
			62.7%	37.3%	100.0%