Table 2.
Comparison results for normal-hearing control subjects (n = 103) and blast-exposed subjects (n = 14). The final column reports the number of blast-exposed subjects whose scores fall outside the calculated 95% confidence intervals for the scores from normal-hearing 18–25 year olds. Numbers in bold highlight that a majority of the blast-exposed subjects reported scores below the derived 95% confidence interval of the normal-hearing controls.
| SSQ 12 Item (SSQ 49 index) | Normal Hearinga mean ± SD | Blast Exposed mean ± SD | Blast Exposed n<95%c.i. | |
|---|---|---|---|---|
| Selective Attention | Q1: Speech in noise (1.1) | 9.5 ± 0.7 | 5.6 ± 1.7 | 12/14 |
| Q3: Speech in speech (1.11) | 9.2 ± 1.1 | 5.8 ± 2.5 | 11/14 | |
| Q4: Speech in noise (1.4) | 8.8 ± 1.2 | 5.4 ± 2.1 | 9/14 | |
| Q5: Multiple speech streams (1.12) | 9.4 ± 1.2 | 6.0 ± 2.2 | 9/14 | |
| Q9: Segregation (3.2) | 9.1 ± 1.3 | 6.1 ± 2.2 | 10/14 | |
| Divided Attention | Q2: Multiple speech streams (1.10) “single talker, TV on--follow both” | 6.2 ± 2.7 | 4.8 ± 2.0 | 0/14 |
| Spatial | Q7: Distance and movement (2.9) | 8.1 ± 1.4 | 6.0 ± 1.9 | 5/14 |
| Q8: Distance and movement (2.13) | 9.2 ± 1.2 | 7.1 ± 1.9 | 5/14 | |
| Q6: Localization (2.6) | 8.7 ± 1.9 | 7.1 ± 1.6 | 1/14 | |
| Quality | Q11: Quality and naturalness (3.9) | 9.6 ± 1.4 | 7.8 ± 1.5 | 3/14 |
| Q12: Listening effort (3.14) | 8.5 ± 2.3 | 5.7 ± 2.1 | 1/14 | |
| Q10: Identification of sound (3.7) | 7.5 ± 2.4 | 7.3 ± 2.2 | 0/14 |
a
From Demeester et al. (2012).