Table 1 Information about thyroid cancer therapy (n = 212)

Time interval between year of diagnosis and conception, years

3.0 (1.5, 4.0)

Cases diagnosed during pregnancy, n (% of pregnancies)

2 (0.9%)

Treatment

 Thyroidectomy only, n (% of pregnancies)

 Thyroidectomy and RAIT, n (% of pregnancies)

 No surgery or RAIT, n (% of pregnancies)

201 (94.8%)

7 (3.3%)

4 (1.9%)

Dosage of L-T4 pre-pregnancy, µg/kg/day

1.63 (1.29, 1.94)

Dosage of L-T4 during pregnancy, µg/kg/day

1.77 (1.38, 2.38)