Table 2.

Comparisons of behavioral audiometric testing success for the entire study population (top section) as well as broken down by test type: visual reinforcement audiometry (VRA) versus conditioned play audiometry (CPA) (bottom two sections). Testing success is broken down by transducer type (air or bone) and number of thresholds obtained. Only ears on which a test was attempted are included in these calculations. n indicates number of ears. Note that one child (2 ears) tested in the clinic and 1 child (2 ears) tested in the lab (control group) were tested via conventional audiometric techniques and is therefore represented in the top section but not in either bottom section as VRA and CPA were not used. Bone conduction outcomes are not presented for control ears as they were rarely, if ever, tested, due to thresholds within-normal-limits.

	Ear-Specific Audiometry: All Methods
Visit	n	Age (months)	Attempted, 0 Thresholds	≥ 1 Air Threshold	≥ 4 Air Thresholds	≥ 1 Unmasked Bone Threshold	≥ 1 Masked Bone Threshold
Clinic	70	23	74%	26%	17%	13%	3%
Research	76	23	53%	47%	36%	4%	21%
Control	27	24	70%	30%	30%
	Audiometry: VRA
Visit	n	Age (months)	Attempted, 0 Thresholds	≥ 1 Air Threshold	≥ 4 Air Thresholds	≥ 1 Unmasked Bone Threshold	≥ 1 Masked Bone Threshold
Clinic	48	15	100%	0%	0%	4%	0%
Research	56	15	70%	30%	14%	4%	13%
Control	15	14	100%	0%	0%
	Audiometry: CPA
Visit	n	Age (months)	Attempted, 0 Thresholds	≥ 1 Air Threshold	≥ 4 Air Thresholds	≥ 1 Unmasked Bone Threshold	≥ 1 Masked Bone Threshold
Clinic	20	39	20%	80%	50%	10%	35%
Research	20	41	5%	95%	95%	5%	45%
Control	10	41	20%	80%	80%