Table 3.

Binomial logistic regression of post-deployment (visit 2) PTSD diagnosis. The number of subjects in this model was 1719. OR, odds ratio; CI, confidence interval; CAPS0, visit 0 (baseline) Clinician Administered PTSD Scale score; CES, Combat Exposure Scale score; PBE, post-battle experience score; CRP, baseline plasma C-reactive protein concentration.

Variable	OR^a,^b	95% CI	P value
Intercept^b	0.009	0.004 – 0.020	<0.001

Cohort 1	0.999	0.407 – 2.452	0.999
Cohort 2	1.130	0.539 – 2.366	0.747
Cohort 3	0.809	0.449 – 1.457	0.480
Cohort 4	0^c
CAPS0	1.056	1.044 – 1.067	<0.001
CES	1.032	1.007 – 1.058	0.012
PBE	1.065	0.993 – 1.142	0.079
log CRP	1.501	1.017 – 2.215	0.041

Odds ratio of PTSD (computed by exponentiating the corresponding coefficient in the regression model and adjusted for the variables listed in the table).

Value for intercept indicates the odds of PTSD at baseline (cohort equals 4 and all other parameters have zero values).

This parameter is set to zero because it is redundant.