Subacute Thyroiditis in Denmark: A Nationwide Study of 1763 Cases
Authors' conclusion
In a Danish nationwide cohort, the incidence of SAT increased during a 22-year period without geographical difference. Notably, the frequency of long-term L-T4 treatment was high, emphasising a focus on the post-diagnosis management of patients with SAT.
Study context
- Population
- Individuals diagnosed with subacute thyroiditis (SAT) at Danish hospitals 1995–2016, before and after mandatory iodine fortification (July 2000)1,747,168 at risk
- Participants
- 1,763 individuals
- Outcome
- Incidence of SAT
Methodological detailsnationwide, Danish health registers
- Nationwide
- Danish health registers
Main finding
As reported in the abstract
Nationwide SAT incidence · 1995 to 2016
Incidence in 1995
3.3/100,000 individuals
95% CI 2.5–4.4
Incidence in 2016
6.2/100,000 individuals
95% CI 5.1–7.6
Observational data: associations, not effects.
Further findings
Started LT4 treatment (permanent hypothyroidism) · 4-year follow-up
- Started LT4
- 459 of 1763 (26.0%)
- LT4 duration >36 months, among those started
- 224 (48.7%)
Original publication
Subacute Thyroiditis in Denmark: A Nationwide Study of 1763 Cases. Clin Endocrinol (Oxf). Published 17 June 2026. doi:10.
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