The Effect of Ethnicity on 2D and 3D Frontomaxillary Facial Angle Measurement in the First Trimester

Table 1

FMFA medians, range, and number for both 2D and 3D according to ethnicity with Wilcoxon matched pairs signed-ranks test.

		Caucasian (C)	North Asian (NA)	South Asian (SA)	East Asian (EA)	Comparison	𝑧	𝑃
2D	Median	86.8°	89.2°	89.0°	88.9°	C-NA	−6.21	<0.001
						C-SA	−3.68	<0.001
	Range	76.2°–97.3°	84.3°–95.4°	84.0°–93.4°	86.2°–95.7°	C-EA	−3.54	<0.001
						NA-SA	0.44	0.66
	𝑛	220	95	46	29	NA-EA	−1.05	0.29
						SA-EA	−0.53	0.60
3D	Median	86.0°	89.5°	88.9°	89.8°	C-NA	−8.18	<0.001
						C-SA	−4.20	<0.001
	Range	76.7°–95.7°	85.2°–94.0°	82.8°–92.4°	86.8°–95.3°	C-EA	−4.87	<0.001
						NA-SA	2.10	0.04
	𝑛	220	108	51	36	NA-EA	−1.94	0.05
						SA-EA	−2.53	0.01
	𝑧	3.94	−1.74	2.01	−0.82
	𝑃	<0.001	0.08	0.04	0.41