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Descriptive statistics of the cervical length measurement (mm) performed by transabdominal and transvaginal ultrasound.
| Descriptive statistics | Transabdominal | Transvaginal |
|---|---|---|
| Mean | 34.6 | 34.8 |
| SD | 7.55 | 6.99 |
|
| ||
| Percentiles: | ||
| 5 | 23 | 21.6 |
| 10 | 26.5 | 25.9 |
| 25 | 30.5 | 31.6 |
| 50 | 34.8 | 36.1 |
| 75 | 38.8 | 39.1 |
| 90 | 43.3 | 42.7 |
| 95 | 46.3 | 44 |
SD = standard deviation.
