Age group (years) | 21–30 | 31–40 | 41–50 | 51–60 | 61–70 |
Mean ± SD (years) | 25.1 ± 2.6 | 36.6 ± 3 | 50 ± 0 | 58.3 ± 0.5 | 62.5 ± 1.7 |
Number of ears | (n = 14) | (n = 16) | (n = 4) | (n = 6) | (n = 4) |
PTAs, (dBHL) | |||||
right ear | 15.9 (11.9) | 19.6 (13.8) | 45.8 (10.6) | 100.6 (33.7) | 23.3 (14.1) |
left ear | 19 (19) | 34 (37) | 51.7 (2.3) | 45.5 (9.2) | 41.7 (30.6) |
Air conduction thresholds | |||||
125 Hz | 17.1 (16.1) | 27.8 (29.8) | 33.7 (4.7) | 60 (47) | 30 (20.4) |
250 Hz | 15.3 (15.1) | 25.3 (28.4) | 36.2 (8.5) | 64.2 (43.6) | 26.3 (22.5) |
500 Hz | 17.5 (17.5) | 25.9 (28.1) | 47.5 (5) | 73.3 (36.8) | 30 (23.8) |
1 kHz | 16.1 (13.7) | 25.6 (28.5) | 46.2 (7.5) | 74.2 (36.1) | 33.7 (21.7) |
2 kHz | 18.9 (21.7) | 28.8 (30.1) | 52.5 (11.9) | 71.7 (39.3) | 33.7 (22.8) |
4 kHz | 24.6 (19.8) | 49.1 (30.1) | 62.5 (6.4) | 78.3 (32.6) | 50 (10.8) |
8 kHz | 32.1 (31.8) | 60.6 (27.6) | 67.5 (8.7) | 89.2 (25.4) | 66.3 (20.2) |