. Author manuscript; available in PMC: 2010 Oct 13.

Published in final edited form as: Am J Obstet Gynecol. 2008 Jun 4;199(5):503.e1–503.e7. doi: 10.1016/j.ajog.2008.04.014

Table 2.

Auditory Evoked Responses: Latencies, GA at Detection and Group Differences

Prenatal Group Definition (based on estimated Fetal Weight)
	GA^*	Mean^† (SD)	1. –3. Quartile	Range	Group Difference to Normotrophs
Normotroph	33w (27w-39w)	293.2 (19) ms	233.5-379.5 ms	74-474ms	-
Hypotroph	33w (27w-38w)	366.7 (27) ms	248-475 ms)	186-560 ms	73.48 ms (s. p=0.034)

Postnatal GroupDefinition: “Hypotroph” subdivided based on Growth Symmetry
	GA^*	Mean^† (SD)	1.–3. Quartile	Range	Group Difference to controls
Normotroph	33w (27w-39w)	293.2 (19) ms	233.5-379.5 ms	74-474ms	-
Asymmetric Growth	37w (27w-38w)	349.4 (32) ms	238.5-475 ms	186-560 ms	57.6 ms (n.s.)
Symmetric Growth	32w (31w-33w)	413 (54) ms	371-482 ms	355-506 ms	120 ms (s. p=0.045)

GA, Gestational Age; w, week

GA of the subject at the AER recording, median and range

^†

Latency estimate after adjusting for mean GA (33w)