TABLE 2.

Numbers of ears classified by the Ambient test LR(A_a) and Tympanometric test LR (A_t) for a CHL at any frequency at criterion ABG levels specified in left column.

Table 2a, 2×2 Decision Table. Each ear was classified as high risk if its predictor was less than the predictor at SYM, and low risk otherwise.
2×2 Decision Table		Ambient		Tympanometric
		CHL	Normal	CHL	Normal
ABG ≥ 20 dB	High Risk	34	2	34	2
	Low Risk	1	41	1	41
ABG ≥ 25 dB	High Risk	26	1	25	3
	Low Risk	0	51	1	49
ABG ≥ 30 dB	High Risk	14	5	14	5
	Low Risk	1	58	1	58

Table 2b, 3×2 Decision Table. An ear was classified as high risk if its predictor was greater than the predictor corresponding to 95% specificity, low risk if the predictor was less than the predictor corresponding to 95% sensitivity, and moderate risk otherwise.
3×2 Decision Table		Ambient		Tympanometric
		CHL	Normal	CHL	Normal
ABG ≥ 20 dB	High Risk	34	1	34	1
	Moderate Risk	0	1	0	1
	Low Risk	1	41	1	41
ABG ≥ 25 dB	High Risk	26	1	25	1
	Moderate Risk	0	1	0	1
	Low Risk	0	50	1	50
ABG ≥ 30 dB	High Risk	11	2	13	3
	Moderate Risk	4	7	2	8
	Low Risk	0	54	0	52