Table 3.
Questionnaires
| Breachers | Engineers | Normal | Site | P values | ||||||||||
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| S 1 | N 2 | Mean3 | SD4 | S 1 | N 2 | Mean3 | SD4 | Range | MCB5 | WRB6 | Slope7 | Participant8 | Site9 | |
| NSI composite | 11 | 52 | 1.34 | (0.29) | 4 | 22 | 1.46 | (0.19) | 1–2.12 | 50 | 24 | 0.43 | 0.3 | 0.96 |
| FHQ composite | 11 | 52 | 1.95 | (0.21) | 4 | 21) | 2.11 | (0.17) | 50 | 23 | 0.36 | 0.11 | 0.68 | |
| SSQ composite | 10 | 15 | 7.42 | (1.75) | 4 | 10 | 7.56 | (1.85) | 0 | 25 | 0.68 | 0.9 | ||
Questionnaires were administered to Breachers and engineers, to include the Neurobehavioral Symptom Inventory (NSI), Functional Hearing Questionnaire (FHQ), and Abbreviated Speech, Spatial, and Qualities of Hearing Questionnaire (SSQ). The NSI was used to document the presence and severity of symptoms across cognitive, somatic, and emotional/behavioral domains. Functional Hearing Questionnaire (FHQ) and Abbreviated Speech, Spatial, and Qualities of Hearing Questionnaire (SSQ) was used to measure perceived hearing ability for complex listening tasks. None of these tests show statistically significant differences over time, between participants, or across sites (P > 0.05 for all). *Groups tested; S1 = number of participants tested; N2 = number of measurements; Mean 3 = Mean; SD 4 = SD; MCB 5 = onsite measurements at MCB Quantico; WRB 6 = baseline measurements at Walter Reed Bethesda; S7 = slope of the variable over time; Participant 7 = difference between Breacher and Engineer groups, and Site 9 = the difference between on-site and baseline measurements.