Table 2.

Two-by-two contingency tables: HFHL₃₅, for the single screening, and for the conditional rescreening

OEC resulta	Pure-tone air conduction audiometryb
	HFHL35	Non-HFHL	Total
Single screen
Positive	18	21	39
Negative	0	41	41
Total	18	62	80
Conditional rescreen
Positive	17	6	23
Negative	1	56	57
Total	18	62	80

^aOccupational Earcheck (OEC) result based on a cut-off value of − 14.9 dB SNR to discriminate between a positive result for at least one ear, and a negative result for both ears

^bTrue high-frequency hearing loss for at least one ear (HFHL₃₅) is defined as a pure-tone average of the frequencies 3, 4, 6 kHz (PTA₃₄₆) of 35 dB HL or worse, according to the pure-tone air conduction audiometry test