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Table 1 Descriptive characteristics of the study sample

From: Co-occurrence of hearing loss and posttraumatic stress disorder among injured military personnel: a retrospective study

Variable Total
No. (%)
(n = 1179)
No hearing loss
No. (%)
(n = 1009)
Unilateral hearing loss
No. (%)
(n = 122)
Bilateral hearing loss
No. (%)
(n = 48)
p-value
Age, years      0.793
 18–25 942 (79.9) 806 (79.9) 96 (78.7) 40 (83.3)  
 26 and older 237 (20.1) 203 (20.1) 26 (21.3) 8 (16.7)  
Year of injury      < 0.001
 2004–2006 765 (64.9) 677 (67.1) 67 (54.9) 21 (43.8)  
 2007–2012 414 (35.1) 332 (32.9) 55 (45.1) 27 (56.3)  
Occupation      0.003
 Non-infantry 603 (51.2) 536 (53.1) 46 (37.7) 21 (43.8)  
 Infantry 576 (48.9) 473 (46.9) 76 (62.3) 27 (56.3)  
Battle injury      < 0.001
 No 614 (52.1) 557 (55.2) 44 (36.1) 13 (27.1)  
 Yes 565 (47.9) 452 (44.8) 78 (63.9) 35 (72.9)  
Blast injury      < 0.001
 No 699 (59.3) 631 (62.5) 55 (45.1) 13 (27.1)  
 Yes 480 (40.7) 378 (37.5) 67 (54.9) 35 (72.9)  
ISS      0.647
 1–9 1115 (94.6) 956 (94.8) 115 (94.3) 44 (91.7)  
 9 and greater 64 (5.4) 53 (5.3) 7 (5.7) 4 (8.3)  
Concussion      0.002
 No 870 (73.8) 760 (75.3) 84 (68.9) 26 (54.2)  
 Yes 309 (26.2) 249 (24.7) 38 (31.2) 22 (45.8)  
PTSD      < 0.001
 No 1056 (89.6) 917 (90.9) 105 (86.1) 34 (70.8)  
 Yes 123 (10.4) 92 (9.1) 17 (13.9) 14 (29.2)  
  1. ISS Injury Severity Score, PTSD posttraumatic stress disorder