. Author manuscript; available in PMC: 2019 Dec 29.

Published in final edited form as: J Head Trauma Rehabil. 2017 May-Jun;32(3):178–184. doi: 10.1097/HTR.0000000000000266

Table 3.

Adjusted Risk Ratios (95% confidence intervals) of Factors Associated with a Diagnosis of Post Traumatic Stress Disorder (PTSD) Following Traumatic Brain Injury (TBI) among Medicare Beneficiaries 2006–2010, n=96,881

Characteristic	PTSD N=269
Age in years	0.93 (0.91, 0.95)
Months post-TBI	0.96 (0.95, 0.98)
Comorbid Conditions
Acute myocardial infarction	0.54 (0.30, 0.97)
Asthma	1.36 (1.01, 1.83)
Atrial fibrillation	0.71 (0.52, 0.98)
Rheumatoid/Osteo arthritis	1.63 (1.17, 2.25)
Psychosis	1.44 (1.10, 1.90)
Pre-TBI diagnosis of
Depression	1.56 (1.18,2.07)
Anxiety	1.48 (1.11,1.98)
PTSD	79.09 (56.29,111.12)