Table 3.

Association Between Genotype and PTSD Symptom Score^a

	Postshooting P Value
	2–4 wk		>1 mo
	All Races	White Participants Only	All Races	White Participants Only
Sample size	161	123	43	35
Stin2 genotype
12/12 vs 12/10 and 12/9 vs 10/10	.81	.90	.80	.55
5-HTTLPR genotype
l/l vs l/s vs s/s	.31	.24	.99	.83
l/l and l/s vs s/s	.13	.09	.97	.81
rs25531 Genotype
A/A vs A/G vs G/G	.01b	.004c	.65	.499
A/Avs A/G and G/G	.003c	.003c	.84	.499
5-HTTLPR multimarker genotype
s/s, lG/lG, and s/lG vs lA/lG, s/lA, and lA/lA	.03b	.006d	.61	.40

Abbreviation: PTSD, posttraumatic stress disorder.

^aMain effect of genotypes on difference in Distressing Event Questionnaire score between times 1 and 2. The sample population was divided into 2 groups those who were interviewed 2 to 4 weeks postshooting and those who were interviewed more than 1 month postshooting. Because of potential population stratification, all races and white participants are analyzed separately.

^bP< .05.

^cP<.005

^dP < .01