Placental morphology in association with autism-related traits in the EARLI study

Table 2 Descriptive statistics of placental morphology features

	N^a	Mean	Median	SD	Min	Max	Reference ranges^b
Perimeter (cm)	101	62.43	61.99	7.55	45.92	92.43	63–69
Area (cm2)	101	278.20	277.38	52.07	160.93	439.80	314–380
Radius (cm)
Minimum	101	5.27	5.66	2.04	0.67	8.95	10–11
Maximum	101	13.73	13.34	2.30	9.65	19.04
Median	101	10.14	9.93	1.19	7.40	13.88
Umbilical cord distance from center (cm)	101	3.52	3.21	2.07	0.23	8.95
Eccentricity
Eccentricity from geometric center	101	1.41	1.35	0.25	1.11	2.64
Eccentricity from cord insertion point	101	3.80	2.40	4.29	1.23	28.01
Thickness of traced central slice (cm)
Maximum	98	2.38	2.32	0.33	1.69	3.49	2.0–2.5
Mean	98	1.67	1.62	0.26	1.20	2.65	2.0–2.5
Placental weight (g)	94	465.29	461.50	80.67	284.00	692.00	414–470
Birthweight: Placental Weight	93	7.55	7.55	1.16	4.56	10.88	6.04–7.23

^aTwo outliers were removed in the analyses
^bReference: Benirschke, K. and P. Kaufmann, Pathology of the human placenta. 2000, Springer: New York. p. 921–922

ISSN: 1471-2393