Table 3 Univariate and multivariate analysis to identify risk factors for avoidable incidental parathyroidectomy

Sex, male

52 (22.2%)

298 (22.9%)

0.828

Age^a

51.5 ± 15.4

51.1 ± 14.9

0.716

BMI^a

26.5 ± 5.5

26.4 ± 5.2

0.865

Thyroid weight^a

38.6 ± 42

56.7 ± 57

< 0.001

Malignant

143 (61.1%)

426 (32.7%)

< 0.001

Grave’s disease

29 (12.4%)

284 (21.8%)

0.001

CLN dissection

143 (61.1%)

329 (25.3%)

< 0.001

4.83 (2.71–8.86)

CLN invasion

55 (42.3%)

128 (42.5%)

0.966

Chronic thyroiditis

89 (38%)

373 (28.7%)

0.004

Thymus tissue

29 (12.4%)

51 (3.9%)

< 0.001

1.72 (1.02–2.82)