Table 3.

Relationship between Age at Enlistment, Traumatic War Exposure, and Development of Unique Cardiovascular, GI, and Nervous Ailments.

Predictor Variablesb
Age at Enlistment	IRRa	95% CI
9–17 years	1.32***	1.25, 1.38
18–20 years	1.28***	1.22, 1.35
21–25 years	1.28***	1.22, 1.34
26–30 years	1.23***	1.17, 1.38
≥ 31 years	-----
POW (1=yes)	1.02	0.96, 1.09
Ever wounded (1=yes)	0.87***	0.84, 0.89
% Company killed
1st quartile	-----
2nd quartile	1.11**	1.04, 1.19
3rd quartile	1.12**	1.04, 1.20
4th quartile	1.14***	1.06, 1.23

-- reference group n=15027

^*p<.05;

^**p<.01;

^***p<.005

^aIncidence rate ratio predicting number of unique cardiac, GI and nervous ailments that a veteran developed over his post-war lifetime.

^bEffect sizes for predictor variables are adjusted for effects of listed predictors, SES, age at death, and year of enlistment.