Systemic sclerosis and risk of bronchiectasis: a nationwide longitudinal cohort study

Table 2 Risk of bronchiectasis according to the presence or absence of systemic sclerosis

	N	Incident bronchiectasis (n)	Duration (PY)	IR per 1000 PY	HR (95% CI)
	N	Incident bronchiectasis (n)	Duration (PY)	IR per 1000 PY	Model 1	Model 2	Model 3
Matched cohort	24,225	455	140,863.73	3.23	1 (reference)	1 (reference)	1 (reference)
Systemic sclerosis cohort	4845	259	25,926.36	9.99	3.10 (2.66–3.61)	3.08 (2.63–3.61)	2.63 (2.22–3.12)

Data are presented as number, rate, or harzard ratio (95% confidence interval)
Model 1 was an unadjusted model; Model 2 was adjusted for sex, age, income, diabetes mellitus, hypertension, and dyslipidemia; Model 3 was additionally adjusted for ESRD, IHD, CHF, COPD, asthma, tuberculosis, and CTDs other than systemic sclerosis. CTDs other than systemic sclerosis were rheumatoid arthritis, systemic lupus erythematous, dermatomyositis, mixed connective tissue disease, or polymyalgia rheumatica
Abbreviations: HR Hazard ratio, CI Confidence interval, PY Person-years, IR Incidence rate, ESRD End-stage renal disease, IHD Ischemic heart disease, CHF Congestive heart failure, COPD Chronic obstructive pulmonary disease, CTD Connective tissue disease

ISSN: 1478-6362