| TA group (n) | F2F group (n) | TA group males (%) | F2F group males (%) | Mean TA group age (SD) | Mean F2F group age (SD) | Mean TA PTA right ear dB HL (SD) | Mean TA PTA left ear dB HL (SD) | Mean F2F PTA right ear dB HL (SD) | Mean F2F PTA left ear dB HL (SD) |
(Ferrari, 2006) [9] | 15 | 15 | 66.60% | 60% | 59.5 (14.8) | 59.5 (14.8) | N/A | N/A | N/A | N/A |
(Campos & Ferrari, 2012) [15] | 25 | 25 | 68.00% | 52.00% | N/A | N/A | N/A | N/A | N/A | N/A |
(Penteado, Ramos et al., 2012) [16] | 3 | N/A | 66.00% | N/A | 68.66 (20) | N/A | N/A | N/A | N/A | N/A |
(Penteado, Bento et al., 2014) [17] | 8 | N/A | 37.50% | N/A | 71.63 (42) | N/A | N/A | N/A | N/A | N/A |
(Pross, Bourne et al., 2016) [18] | 169 | 338 | 100% | 96% | 74 (9.8) | 76 (10.3) | N/A | N/A | N/A | N/A |
(Venail, Picot et al., 2019) [19] | 26 | 26 | 53.80% | 65.40% | 66.8 (16.0) | 70 (11.1) | 52.8 (10.2) | 54.7 (10.9) | 52.7 (8.8) | 54.8 (11) |
(Tao et al., 2021) [20] | 28 | 28 | 60.70% | 64.30% | 74.2 (9.2) | 75.2 (10) | 48 (16.79) | 45.14 (12.83) | 45.75 (7.17) | 48.34 (18.45) |