Table 3

Incidence and IRR of aDCSI change for allergic conjunctivitis in the type 1 diabetes mellitus cohort

Change in aDCSI score per year	N	Number of events	Rate*	Crude IRR	95% CI	Adjusted IRR^†	95% CI
Type 1 diabetes mellitus
0–0.50	3357	399	18.7	1	(Reference)	1	(Reference)
0.51–1.00	443	81	26.2	1.40	(1.12 to 1.76)***	1.68	(1.34 to 2.10)***
1.01–2.00	244	64	48.2	2.58	(2.01 to 3.31)***	3.78	(2.92 to 4.88)***
>2.00	116	57	183.1	9.81	(7.56 to 12.7)***	18.8	(14.2. 24.7)***
p for trend				<0.001		<0.001

*Rate, per 1000 person-years, *** p<0.001.
†Adjusted IRR: multivariable analysis including sex, age, urbanisation, parental occupation, and comorbidities of rhinitis and urticaria.
aDCSI, adapted Diabetes Complications Severity Index; IRR, incidence rate ratio.