Table 2.
Hearing outcomes of 13 comparative studies between EES and MES
| Study/country | PTA calculation (frequency) | EES vs. MES |
||
|---|---|---|---|---|
| Preoperative audiometry | Postoperative audiometry | Gain in ABG | ||
| Jyothi et al. (2017) [9]/lndia | NA | Mean ABG (dB): 34.16 vs. 35.54 | Mean ABG (dB): 18 vs. 16 | Mean improvement of ABGs (dB): 16.16 (SD, 4.68) vs. 19.54 (SD, 3.45) |
| Plodpai and Paje (2017) [10]/Thailand | 0.5, 1, 2, and 4 kHz | Median (range) ABG (dB): 25 (20-31) vs. 27 (16-30) | Median (range) ABG (dB): 13(5-18) vs. 15(10-19) | Median improvement of ABGs (dB)j 12 vs. 12 |
| James (2017) [11]/Canada | NA | NA | NA | NA |
| Nassif et al. (2015) [12]/Italy | 0.5, 1, 2, and 4 kHz | Median ABG (dB): 16.6 vs. 19.4 | Median ABG (dB): 6.6 vs. 6.2 | Median improvement of ABGs (dB): 9.4 vs. 11.2 |
| Harugop et al. (2008) [13]/lndia | 0.5, 1, and 2 kHz | ABG <10dB:0vs. 0 | ABG <10 dB: 23 (46%) vs. 10(20%) | NA |
| 10dB<ABG<20dB: 20 (40%) vs. 20 (4%) | 10 dB<ABG<20 dB: 22 (44%) vs. 35 (70%) | |||
| 20 dB<ABG<30 dB: 28 (56%) vs. 30 (60%) | 20 dB<ABG<30 dB: 5 (10%) vs. 5 (10%) | |||
| 30 dB<ABG<40 dB: 2 (4%) vs. 0 | 30dB<ABG<40dB:0vs. 0 | |||
| Lade et al. (2014) Bindia | NA | Mean ABG (dB): 28.5 (SD, 5.11) vs. 32.37 (SD, 5.80) | Mean ABGs (dB): 18.13 (SD, 7.11) vs. 16.87 (SD, 6.84) | Mean improvement of ABGs (dB): 10.37 (SD, 6.11) vs. 15.5 (SD, 6.32) |
| Raj and Meher (2001) [15]/lndia | NA | ABG <10 dB: 2(10%) vs. 2(10%) | ABG <10 dB: 12(60%) vs. 11 (55%) | ABG <10 dB: 14(70%) vs. 16 (80%) |
| 10 dB<ABG<20 dB: 6 (30%) vs. 9 (45%) | 10 dB<ABG<20 dB: 6 (30%) vs. 6 (30%) | 10 dB<ABG<20 dB: 6 (30%) vs. 3 (15%) | ||
| 20 dB<ABG<30 dB: 10 (50%) vs. 7 (35%) | 20 dB<ABG<30 dB: 1 (5%) vs. 2 (10%) | 20 dB<ABG<30 dB: 0 vs. 1 (5%) | ||
| 30 dB<ABG<40 dB: 2 (10%) vs. 2 (10%) | 30 dB<ABG<40 dB: 1 (5%) vs. 1 (5%) | 30dB<ABG<40dB:0vs. 0 | ||
| Lakpathi et al. (2016) [16]/lndia | 0.5, 1, and 2 kHz | ABG <10dB:0vs. 0 | ABG <10dB: 14 (46%) vs. 7 (25%) | NA |
| 10dB<ABG<20dB: 12 (40%) vs. 12 (40%) | 10 dB<ABG<20 dB: 13 (44%) vs. 19 (65%) | |||
| 20 dB<ABG<30 dB: 15 (50%) vs. 18 (60%) | 20 dB<ABG<30 dB: 3 (10%) vs. 3 (10%) | |||
| 30 dB<ABG<40 dB: 3 (10%) vs. 0 | 30dB<ABG<40dB:0vs. 0 | |||
| Kumar et al. (2015) [17]/lndia | NA | Mean ABG (dB): 30 vs. 31.53 | Mean ABG (dB): 15 vs. 16.03 | Mean improvement of ABGs (dB): 15.03 vs. 13.96 |
| Dundar et al. (2014) [18]/Turkey | 0.5, 1, 2, and 4 kHz | Mean ABG (dB): 20.40 (SD, 4.33) vs. 21.34 (SD, 3.90) | Mean ABG (dB): 8.12 (SD, 3.27) vs. 8.13 (SD, 2.43) | Mean improvement of ABGs (dB): 12.3 (SD, 3.8) vs. 13.2 (SD, 3.2) |
| Kaya et al. (2017) [19]/Turkey | 0.5, 1, 2, and 4 kHz | Mean ABG (dB): 23.23 (SD, 6.79) vs. 24.89 (SD, 6.62) | Mean ABG (dB): 13.75 (SD, 3.37) vs. 15.00 (SD, 4.64) | Mean improvement of ABGs (dB): 9.48 (SD, 5.23) vs. 9.89 (SD, 2.79) |
| Huang et al. (2016) [20]/Taiwan | 0.5, 1, and 2 kHz | Mean ABG (dB): 21.6 (SD, 11.2) vs. 21.4 (SD, 10.6) | Mean ABG (dB): 12.7 (SD, 8.8) vs. 13.1 (SD, 9.4) | Mean improvement of ABGs (dB): 8.9 (SD, 10.0) vs. 8.3 (SD, 10.0) |
| Kuo and \Nu (2017) [24]ATaiwan | 0.5, 1, and 2 kHz | Mean ABG (dB): 22.48 vs. 26.7 | Mean ABG (dB): 11.79 vs. 18.7 | Mean improvement of ABGs (dB): 10.69 vs. 8 |
EES, endoscopic ear surgery; MES, microscopic ear surgery; PTA, pure tone audiometry; ABG, air-bone gap; NA, not available; SD, standard deviation.