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Table 1 Patients’ demographics

From: Identifying risk factors of recurrence for clinically node negative papillary thyroid carcinoma with pathologic N1a

Variables

Number (percent)

Age§

46.0 years (15–75)

  < 55 years

822 (76.0)

  ≥ 55 years

260 (24.0)

Sex

 Female

869 (80.3)

 Male

213 (19.7)

Underlying disease

 Hypertension

183 (16.9)

 Diabetes

71 (6.6)

Tumor size*

1.15 cm ± 0.74

  ≤ 1 cm

652 (60.3)

  > 1 cm

430 (39.7)

T stage

 

 T1a

622 (57.5)

 T1b

230 (21.3)

 T2

51 (4.7)

 T3a

3 (0.3)

 T3b

119 (11.0)

 T4a

57 (5.3)

Number of harvested lymph node

  ≤ 4

447 (41.3)

  ≥ 5

635 (58.7)

Multifocality

331 (30.6)

Bilaterality

242 (22.4)

Chronic lymphocytic thyroiditis

334 (30.9)

Lymphovascular invasion

23 (2.1)

TNM stage

 Stage I

950 (87.8)

 Stage II

116 (10.7)

 Stage III

16 (1.5)

Radioactive iodine therapy

986 (91.1)

Recurrence

62 (5.7)

follow-up§

78 months (12–158)

Total patients

1082 (100)

  1. § represents median and range, * represents mean and standard deviation