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Table 1 Association between ultrasound characteristics and thyroid malignancy in the bivariate analysis (n = 263)

From: Diagnostic accuracy of ultrasound characteristics in the identification of malignant thyroid nodules

Ultrasound characteristic Malignant, n (%) Benign, n (%) Total, n (%) Crude odds ratio (95% CI) p value
Size (cm)
 ≥ 2 14 (12.1) 102 (87.9) 116 (100.0) 0.9 (0.4–1.9) 0.854
 < 2 19 (12.9) 128 (87.1) 147 (100.0)   
Taller than wide
 Taller than wide 16 (18.8) 69 (81.2) 85 (100.0) 2.3 (1.0–4.6) 0.046
 Wider than tall 17 (9.6) 161 (90.4) 178 (100.0)   
Echogenicity
 Hypoechogenicity 22 (27.5) 58 (72.5) 80 (100.0) 5.9 (2.7–12.9) < 0.001
 Iso/hyperechogenicity 11 (6.0) 172 (94.0) 183 (100.0)   
Consistency
 Solid 32 (13.7) 202 (86.3) 234 (100.0) 4.4 (0.6–33.7) 0.145
 Cystic 1 (3.4) 28 (96.6) 29 (100.0)   
Borders
 Irregular 12 (38.7) 19 (61.3) 31 (100.0) 6.3 (2.7–14.9) < 0.001
 Regular 21 (9.1) 211 (90.9) 232 (100.0)   
Halo
 Absent halo 26 (17.9) 119 (82.1) 145 (100.0) 3.5 (1.4–8.3) 0.004
 Halo present 7 (5.9) 111 (94.1) 118 (100.0)   
Calcification
 Micro-calcification 12 (60.0) 8 (40.0) 20 (100.0) 15.9 (5.8–43.1) < 0.001
 No micro-calcification 21 (8.6) 222 (91.4) 243 (100.0)   
Vascularity
 Internal vascularity 16 (25.0) 48 (75.0) 64 (100.0) 3.6 (1.7–7.6) 0.002
 No internal vascularity 17 (8.5) 182 (91.5) 199 (100.0)