Table 2.

Hazard Ratios and Corresponding Confidence Intervals for Any Thyroid Cancer and Papillary Thyroid Cancer in Patients with Celiac Disease Diagnosed in Sweden in 1969–2008

Follow-up	Observed events	Expected events	HR [CI]	Absolute risk/ 100,000 PYAR
Thyroid cancer
All	7	12	0.6 [0.3–1.3]	2.1
<5 years	2	4	0.6 [0.1–2.4]	1.5
5+ years	5	8	0.6 [0.2–1.6]	2.6
Papillary thyroid cancer
All	5	7	0.7 [0.3–1.8]	1.5
<5 years	1	2	0.5 [0.07–3.9]	0.7
5+ years	4	5	0.8 [0.3–2.2]	2.1

Reference is general population comparator cohort. Estimates from the Cox proportional hazards model internally stratified for age, sex, county, and calendar period.

HR, hazard ratio; CI, confidence interval; PYAR, person years at risk.