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Table 1 Characteristics of the study population

From: Development of a clinical decision model for thyroid nodules

Patient Characteristics No. %
Gender   
   Male 46 21.3
   Female 170 78.7
Patient age, years mean ± SD = 47.1 ± 15.9
   Median (range) 47 (18 – 85)
Disease Characteristics No. %
Serum TSH mean ± SD = 2.6 ± 6.8
Pre-operative thyroid status   
   Euthyroid 174 80.6
   Hyperthyroid 26 12
   Hypothyroid 16 7.4
Dominant thyroid nodule size (cm) mean ± SD = 2.8 ± 1.6
Dominant thyroid nodule size   
<2 cm 78 35.9
2 – 4 cm 101 46.5
>4 cm 38 17.5
Imaging Characteristics No. %
Thyroid Scintigraphy   
Cold 21 58.3
Warm 3 8.3
Hot 12 33.3
Thyroid Ultrasound   
Simple cyst 4 1.9
Complex cyst 8 3.7
Mixed 32 14.8
Solid 172 79.6
Thyroid EIS Level of Suspicion   
I: Definitely benign 22 10.1
II: Highly unlikely to be malignant 49 22.5
III: Unlikely to be malignant 21 9.6
IV: Likely to be malignant 64 29.5
V: Highly likely to be malignant 62 28.4
Pathological Characteristics No. %
Fine needle aspiration cytology   
Inadequate 6 2.8
Not done 9 4.2
Negative 30 13.9
Positive 62 28.7
Indeterminate 109 50.4
Surgical Histopathology   
Benign 106 49.1
Malignant 110 50.9