Table 4.

Characteristics of patients who had their second claim associated with ILD prior to their SSc index date and who had their first claim associated with ILD after their SSc index date in the Optum ICD-9-CM cohort.

	Second claim associated with ILD prior to SSc index date (n = 52)	First claim associated with ILD after SSc index date (n = 127)	P value*
Age, yr, mean (SD)	62.6 (13.0)	60.9 (12.1)	.46
Female, n (%)	43 (82.7)	98 (77.2)	.30
Race, n (%)			.55
White	29 (55.8)	73 (57.5)
Black	9 (17.3)	14 (11.0)
Hispanic	10 (19.2)	18 (14.2)
Asian	2 (3.9)	9 (7.1)
Missing	2 (3.9)	13 (10.2)