Table 1.

Number of babies and ears from each test site, broken down by ear, sex, age at first test, number of ears contributing to the MEPA and DP datasets, birth weight, head circumference, birth type, race/ethnicity (as reported by the parents).

		Site
		UUH & UWMC	UUH	UWMC
Babies (Count)		324	262	62
Ears (Count)	Total	493	395	98
	Left ear only	67	50	17
	Right ear only	88	79	9
	Both ears	169	133	36
	Left ears total	236	183	53
	Right ears total	257	212	45
Sex (Count)	Females	151	120	31
	Males	173	142	31
Age (Hours)	Range	3 to 102	3 to 96	19 to 102
	Mean	29	26	40.6
	SD	15.5	13.9	16.9
	Median	25	24	38.5
MEPA (Count)	Ears for 2kHz tone	483	385	98
	Ears for chirp	347	261	86
	Both tone and chirp	337	251	86
DP (Count)	Pass status	352	263	89
	Refer status	141	132	9
Birth Weight (g)	Mean	3295	3311	3227
	SD	458	434	541
Head Circumference (cm)	Mean	34	34	35
	SD	1.8	1.8	1.6
Birth Type – Vaginal	Total	304	267	37
Birth Type – C-section	Total	182	128	54
Birth Type – Other	Total	7	0	7
Ethnicity – African American	Total	7	3	4
Ethnicity – American Indian or Alaskan Native	Total	4	4	0
Ethnicity – Asian	Total	4	1	3
Ethnicity – Hispanic/Latino	Total	149	148	1
Ethnicity – Pacific Islander	Total	4	4	0
Ethnicity – White, Non-Hispanic	Total	143	126	17
Ethnicity – Undeclared	Total	182	109	73