Higher free triiodothyronine (FT3) levels (mean difference = 1.85, 95% CI: 0.60-3.09; Z = 2.91, P = 0.004; I2 = 0%) and positive thyroglobulin antibodies (TgAb) (OR = 2.57, 95% CI: 1.35-4.88, P = 0.004; I2 = 57%, τ2 = 0.13) were significantly associated with an increased risk of permanent hypothyroidism after SAT. Here, TG is linked to hypothyroidism.