Table 2. Distribution of raw DPOAE level test-retest differences given by baseline age and f2.

Sample size (N), mean, standard error of the measurement (SEM), and standard error of the SEM (SESEM) of the observed test-retest level shifts (DPOAE level at follow up minus DPOAE level at baseline). For illustrative purposes, data are presented using the baseline age groups from Fig. 2 (<1 yr; 1–3 yrs; 3–5 yrs; 5+ yrs) for several test-retest intervals (0–3, 3–6 and 6–9 months post baseline).

		Follow-up Interval (in months)
		0–3				3–6				6–9
		n	MeanShift	SEM	SESEM	n	MeanShift	SEM	SESEM	n	MeanShift	SEM	SESEM
f2 Primary (Hz)	Baseline Age
2063	<1yr	26	−0.2	2.6	1.9	28	−2.4	3.6	2.5	11	−2.4	3.7	2.7
	1–3yrs	28	−0.8	3.3	2.3	39	0.6	3.2	2.3	10	0.1	3.3	2.4
	3–5yrs	16	−1.1	3.8	2.7	15	0.3	3.8	2.7	5	5.6	4.8	3.6
	5+yrs	23	−0.7	2.2	1.6	29	−3.6	4.2	3.0	8	−0.3	2.6	1.9
3000	<1yr	26	−0.6	2.1	1.5	29	−1.6	2.2	1.6	11	−2.5	2.3	1.7
	1–3yrs	31	−1.4	2.5	1.8	40	0.2	3.7	2.6	12	−1.0	3.1	2.2
	3–5yrs	15	−0.7	2.2	1.6	14	0.3	1.7	1.2	5	2.4	2.8	2.0
	5+yrs	25	0.2	1.8	1.3	29	−0.5	2.4	1.7	8	−1.5	2.5	1.8
4219	<1yr	26	−2.2	2.9	2.1	29	−2.2	3.1	2.2	11	−2.9	3.0	2.1
	1–3yrs	31	−0.4	3.4	2.4	39	−0.1	2.9	2.1	12	−0.8	1.9	1.3
	3–5yrs	17	−0.4	1.6	1.2	15	−0.2	1.7	1.2	5	2.6	1.3	1.0
	5+yrs	25	0.1	2.4	1.7	29	0.0	2.4	1.7	8	−1.3	2.0	1.4
6000	<1yr	26	−1.4	3.3	2.4	29	0.0	4.4	3.2	11	−2.1	5.0	3.6
	1–3yrs	31	−0.5	2.6	1.8	41	0.7	3.0	2.1	12	0.3	2.2	1.6
	3–5yrs	17	−1.0	1.9	1.4	15	−1.6	1.9	1.4	5	−0.8	1.0	0.8
	5+yrs	25	−1.0	2.8	2.0	28	−0.8	2.3	1.7	8	−1.5	3.2	2.3