TABLE 2

Association between African-American race, mortality, all-cause hospitalisations and respiratory hospitalisations

	African-American patients	Non-African-American patients	p-value
Patients	222	1418
Mortality
Mean survival time months (95% CI)	103 (96–110)	85 (81–88)	<0.001
Mortality	42 (18.9)	377 (26.6)	0.015
Absolute mortality rate (events per person-year)	0.04	0.09	<0.001
Relative mortality risk^# (unadjusted)	0.51		<0.001
Relative mortality risk^# (adjusted^¶)	0.42		<0.001
Lung transplantation	10 (4.5)	55 (3.9)	0.657
All-cause hospitalisations
Hospitalisation count (n per hospitalised patient)	336 (2.9)	1785 (3.1)	0.588
Hospitalisation rate (events per person-year)	0.35	0.44	<0.001
Relative risk of hospitalisation⁺ (unadjusted)	0.81		<0.001
Relative risk of hospitalisation⁺ (adjusted^¶)	0.78		<0.001
Respiratory hospitalisations
Respiratory hospitalisation count (n per hospitalised patient)	125 (2.1)	516 (1.8)	0.306
Respiratory hospitalisation rate (events per person-year)	0.13	0.13	0.709
Relative risk of respiratory hospitalisation⁺ (unadjusted)	1.04		0.658
Relative risk of respiratory hospitalisation⁺ (adjusted)	1.04		0.709
GAP-ILD score median (interquartile range)	4 (1–8)	4 (0–8)	0.511

Data are presented as n or n (%), unless otherwise stated. GAP: gender–age–physiology; ILD: interstitial lung disease. ^#: computed using Cox proportional hazard models; ^¶: adjusted for baseline demographic characteristics: body mass index, age, sex, forced vital capacity % predicted, diffusing capacity of the lung for carbon monoxide % predicted, ILD subtype, GAP-ILD score, immunosuppressive therapy, antifibrotic therapy and socioeconomic determinants of access to care; ⁺: computed using Poisson regression models.