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Table 4 Univariate analysis of transient hypoparathyroidism

From: Relationship between hypoparathyroidism and the number of parathyroid glands preserved during thyroidectomy

Factors

Transient hypoparathyroidism

P-value

Ā 

No nā€‰=ā€‰180

Yes nā€‰=ā€‰254

Ā 

Age

51.8ā€‰Ā±ā€‰12.4

49.6ā€‰Ā±ā€‰12.5

0.075

Gender

Ā Ā 

0.411

ā€ƒā€‰Male

43 (23.9%)

52 (20.5%)

Ā 

ā€ƒā€‰Female

137 (76.1%)

202 (79.5%)

Ā 

Tumor size (mm)

12.1ā€‰Ā±ā€‰9.7

11.4ā€‰Ā±ā€‰8.6

0.398

Tumor location

Ā Ā 

0.899

ā€ƒā€‰Right

69 (38.3%)

97 (38.2%)

Ā 

ā€ƒā€‰Left

64 (35.6%)

97 (38.2%)

Ā 

ā€ƒā€‰Bilateral

41 (22.8%)

51 (20.1%)

Ā 

ā€ƒā€‰Confined to isthmus

6 (3.3%)

9 (3.5%)

Ā 

Tumor multiplicity

55/180 (3.6%)

72/254 (28.3%)

0.669

Tumor bilaterality

44/180 (24.4%)

52/254 (20.5%)

0.349

Preserved PTG number

Ā Ā 

0.025

ā€ƒā€‰4

157 (87.2%)

194 (76.4%)

Ā 

ā€ƒā€‰3

21 (11.75)

53 (20.9%)

0.010

ā€ƒā€‰2

1 (0.6%)

5 (2.0%)

0.470

ā€ƒā€‰1

1 (0.6%)

2 (0.8%)

0.583

Incidental parathyroidectomy

23/180 (12.8%)

60/254 (23.6%)

0.004

T classification

Ā Ā 

0.123

ā€ƒā€‰T1

98(54.4%)

136(53.5%)

Ā 

ā€ƒā€‰T2

15(8.3%)

11(4.3%)

Ā 

ā€ƒā€‰T3

64(35.6%)

106(41.7%)

Ā 

ā€ƒā€‰T4

3(1.7%)

1(0.4%)

Ā 

N classification

Ā Ā 

0.422

ā€ƒā€‰N0

116(64.4%)

153(60.2%)

Ā 

ā€ƒā€‰N1

64(35.6%)

101(39.8%)

Ā 

TNM stage

Ā Ā 

0.212

ā€ƒā€‰I

100(55.6%)

158(62.2%)

Ā 

ā€ƒā€‰II

7(3.9%)

3(1.2%)

Ā 

ā€ƒā€‰III

52(28.9%)

65(25.6%)

Ā 

ā€ƒā€‰IV

21(11.7%)

28(11.0%)

Ā 

Extrathyroidal extension (minimal)

79/180 (43.9%)

118/254 (46.5%)

0.625

CND (bilateral versus unilateral)

79/122(64.8%)

137/194(70.6%)

0.320

CND (yes versus no)

122/180 (67.8%)

194/254 (76.4%)

0.031

Lateral ND

26/180 (14.4%)

39/254 (15.4%)

0.892

Lateral LN metastasis

Ā Ā 

0.275

ā€ƒā€‰None

161 (89.4%)

218 (85.8%)

Ā 

ā€ƒā€‰Unilateral

13 (7.2%)

30 (11.8%)

Ā 

ā€ƒā€‰Bilateral

6 (3.3%)

6 (2.4%)

Ā 

Operation time (minutes)

160ā€‰Ā±ā€‰74

170ā€‰Ā±ā€‰84

0.215

Retrieved central LN (No)

4.6ā€‰Ā±ā€‰5.1

6.0ā€‰Ā±ā€‰5.6

0.007

Metastatic central LN (No)

1.0ā€‰Ā±ā€‰2.0

1.6ā€‰Ā±ā€‰3.2

0.016

Amount of drainage (mL)

224ā€‰Ā±ā€‰787

225ā€‰Ā±ā€‰619

0.985

Vocal cord paralysis

Ā Ā 

0.679

ā€ƒā€‰None

172(95.6%)

244(96.1%)

Ā 

ā€ƒā€‰Temporary

7(3.9%)

10(3.9%)

Ā 

ā€ƒā€‰Permanent

1(0.6%)

0

Ā 

Hematoma

8/180(4.4%)

11/254(4.3%)

0.567

  1. CND, central neck dissection; LN, lymph node; ND, neck dissection; No, number; PTG, parathyroid gland.