Table 3 Univariate and multivariate^a logistic regression analysis of hearing loss and PTSD (n = 1179)

 None

Ref

Ref

 Unilateral

1.61 (0.93–2.81)

1.23 (0.69–2.17)

 Bilateral

4.11 (2.13–7.93)^b

2.92 (1.47–5.81)^b

Age, years

NS

 18–25

Ref

 26 and older

0.70 (0.42–1.17)

Year of injury

NS

 2004–2006

Ref

 2007–2012

1.57 (1.08–2.29)^b

Occupation

NS

 Non-infantry

Ref

 Infantry

2.47 (1.66–3.67)^b

Battle injury

 No

Ref

Ref

 Yes

7.07 (4.27–11.69)^b

6.64 (4.00–11.03)^b

Blast injury

NS

 No

Ref

 Yes

4.66 (3.07–7.07)^b

ISS

NS

 1–8

Ref

 9 and greater

2.86 (1.55–5.26)^b

Concussion

NS

 No

Ref

 Yes

2.86 (1.96–4.19)^b