Research Article
Ultrasound Measurements of Fetal Thyroid: Reference Ranges from a Cohort of Low-Risk Pregnant Women
Table 2
Measurements of longitudinal, anteroposterior, and transverse diameters and fetal thyroid lobe volume according to the side and gender of the fetus.
| Measurements | Side | n | Mean | Median | DP | Min | Max | value |
| Longitudinal | R | 255 | 13.07 | 13.50 | 4.49 | 2.60 | 24.80 | 0.3935 | Longitudinal | L | 252 | 13.10 | 13.30 | 4.55 | 2.70 | 28.40 | Anteroposterior | R | 255 | 5.45 | 5.40 | 1.95 | 0.90 | 11.10 | 0.0787 | Anteroposterior | L | 252 | 5.35 | 5.35 | 1.91 | 1.30 | 10.70 | Transverse | R | 255 | 5.97 | 5.70 | 2.11 | 1.30 | 12.70 | 0.3530 | Transverse | L | 252 | 5.90 | 5.65 | 2.13 | 1.60 | 11.90 | Volume | D | 255 | 289.70 | 227.91 | 253.79 | 2.20 | 1586.10 | 0.0789 | Volume | L | 251 | 285.92 | 212.36 | 260.09 | 3.27 | 1693.90 |
| Measurements† | Gender | n | Mean | Median | DP | Min | Max | value‡ |
| Longitudinal | M | 138 | 13.41 | 13.80 | 4.20 | 3.85 | 24.35 | 0.1563 | Longitudinal | F | 117 | 12.65 | 12.70 | 4.59 | 2.65 | 23.65 | Anteroposterior | M | 138 | 5.62 | 5.38 | 1.90 | 1.85 | 10.55 | 0.1384 | Anteroposterior | F | 117 | 5.13 | 5.45 | 1.78 | 1.20 | 9.80 | Transverse | M | 138 | 6.16 | 6.00 | 2.05 | 2.00 | 12.30 | 0.0931 | Transverse | F | 117 | 5.68 | 5.60 | 2.01 | 1.45 | 9.80 | Volume | M | 134 | 633.68 | 479.31 | 546.94 | 14.83 | 3280.10 | 0.0797 | Volume | F | 117 | 513.10 | 420.54 | 445.20 | 5.59 | 1955.50 |
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ANOVA for repeated measurements; †mean of right/left side measurements; ‡Mann–Whitney Test; F: female; L: left; M: male; R: right. |