Cumulative permanent postoperative hypoparathyroidism after initial surgery and revision thyroidectomy was present in 1 (0.6%) TT versus 2 (1.1%) DO versus 5 (2.9%) BST patients (nonsignificant differences), whereas the cumulative permanent recurrent laryngeal nerve injury was found in 4 (1.1%) TT versus 5 (1.4%) DO versus 5 (1.4%) BST nerves at risk (nonsignificant differences). Detailed data are shown in Table 3. The primary outcomes were twice as inferior at 10 years when compared to 5-year results for DO and BST, but not for TT . No significant differences were observed between the three surgeons involved in this study and the outcomes of surgery they performed.Table 3Complications after initial versus revision thyroidectomy and cumulative risk of morbidity among 526 patients who completed the 10-year follow-upTTPTT versus DODOPDO versus BSTBSTPTT versus BST Risk of initial thyroid surgery (n = 600) a n 200200200Hypoparathyroidism [no (%)] Total22 (11.5) 0.007 8 (4.2)0.2414 (2.1) <0.001 Transient21 (11.0) 0.012 8 (4.2)0.2414 (2.1) <0.001 Permanent1 (0.5)0.3160 (0)1.0000 (0)0.316Recurrent laryngeal nerve injury [no (%)] Total25 (6.5)0.35219 (5.0)0.08810 (2.6) 0.009 Temporary21 (5.5)0.39916 (4.2)0.0978 (2.1) 0.014 Permanent4 (1.0)0.7043 (0.8)0.6532 (0.5)0.412Hemorrhage [no (%)]0 (0)0.3161 (0.5)0.5622 (1.0)0.156 Risk of revision thyroidectomy (n = 20) b n 1514Hypoparathyroidism [no (%)] Total0 (0)1.0003 (60.0)1.00010 (71.4)0.333 Transient0 (0)1.0001 (10.0)1.0005 (35.7)1.000 Permanent0 (0)1.0002 (40.0)1.0005 (35.7)1.000Recurrent laryngeal nerve injury [no (%)] Total0 (0)1.0003 (60.0)0.4115 (17.8)1.000 Temporary0 (0)1.0001 (20.0)1.0002 (7.1)1.000 Permanent0 (0)1.0002 (40.0)0.5923 (10.7)1.000Hemorrhage [no (%)]0 (0)1.0000 (0)1.0001 (7.1)1.000 Cumulative risk of initial and revision thyroidectomy (n = 526) a Permanent hypoparathyroidism [no (%)]1 (0.6)0.5552 (1.1)0.2525 (2.9)0.097Permanent recurrent laryngeal nerve injury [no (%)]4 (1.1)0.7175 (1.4)1.0005 (1.4)0.724Hemorrhage [no (%)]1 (0.6)1.0001 (0.6)0.3173 (1.7)0.309Bold values are statistically significant (p < 0.05) TT total thyroidectomy, DO Dunhill operation, BST bilateral subtotal thyroidectomy calculation for nerves at risk, not for patients a χ 2 test b F test