Table 4.

Comparison of strict versus relaxed biometry criteria and calculated estimated gestational age by volume sweep imaging protocol and standard of care ultrasound

Trimester	Within 7 days		Within 14 days
	Overall agreement (strict)	Overall agreement (including relaxed)	Overall agreement (strict)	Overall agreement (including relaxed)
All exams (n = 126)	42.2% (32.8–52.0%)	48.2% (38.6–57.9%)	67.9% (58.3–76.5%)	69.1% (59.6–77.6%)
Second trimester (n = 68)	56.7% (43.2–69.4%)	63.9% (50.6–75.8%)	85% (73.4–92.9%)	88.5% (77.8–95.3%)
Third trimester (n = 58)	24.5% (13.3–38.9%)	28.6% (16.6–43.3%)	46.9% (32.5–61.7%)	44.9% (30.7–59.8%)

All values are percentage (95% confidence interval)