Table 1.

Clinical characteristics of samples in discovery and replication subsamples. The p-values were computed from t-tests (for age and BMI) and chi-squared test (for race).

All	PTSD N = 56	Control N = 68	P-value
Age
Mean (SD)	56.2 (8.0)	53.1 (7.4)	0.028
Race N (%)
Caucasian	51 (91.1)	57 (83.8)	0.353
Other	5 (8.9)	11 (16.2)
BMI
Mean (SD)	31.6 (4.8)	30.8 (4.7)	0.319
Discovery	PTSD N = 39	Control N = 49	P-value
Age
Mean (SD)	55.7 (7.8)	52.7 (7.6)	0.071
Race N (%)
Caucasian	35 (89.7)	41 (83.7)	0.609
Other	4 (10.3)	8 (16.3)
BMI
Mean (SD)	31.2 (4.8)	31.0 (4.6)	0.841
Replication	PTSD N = 17	Control N = 19	P-value
Age
Mean (SD)	57.4 (8.4)	54.3 (7.1)	0.238
Race N (%)
Caucasian	16 (94.1)	16 (84.2)	0.680
Other	1 (5.9)	3 (15.8)
BMI
Mean (SD)	32.5 (5.1)	30.1 (5.0)	0.153