Serotonin transporter gene polymorphisms and brain function during emotional distraction from cognitive processing in posttraumatic stress disorder

Table 1 Demographic and Clinical Characteristics of Subject Sample¹

Characteristic	Control n = 20	PTSD n = 22	Group Comparison
Age (years) [SD]	37.6 [11.0]	30.8 [8.8]	t(40) = 2.2, p < 0.05
Gender, No.(%) of females	7 (35.0)	13 (59.1)	χ²(1) = .29, p > 0.5
Handedness, No.(%) right-handed	17 (85.0)	19 (86.4)	χ²(2) = 0.68, p > 0.7
Race, No.(%) of Caucasian subjects	8 (40.0)	12 (54.5)	χ²(2) = 2.1, p > 0.3
Education (years) [SD]	13.9 [2.8]	13.3 [1.8]	t(40) = 0.8, p > 0.4
Davidson Trauma Scale [SD]	10.2 [8.8]	74.4 [18.8]	t(40) = 13.9, p < 0.001
Combat Exposure Scale [SD]	8.6 [11.0]	12.6 [10.3]	t(40) = 1.2, p > 0.2
Beck Depression Inventory [SD]	7.1 [6.1]	20.8 [9.0]	t(40) = 5.7, p < 0.001
Alcohol Use Disorders Identification Test [SD]	2.6 [3.2]	6.1 [6.3]	t(40) = 2.6, p < 0.05
Drug Abuse Screening Test, [SD]	0.4 [0.8]	2.1 [2.5]	t(40) = 2.9, p < 0.01
Antidepressant Medication, No. (%) prescribed ²	1 (5.0)	8 (36.4)	χ²(1) = 6.1, p < 0.01
Antidepressant Dosage equivalents [SD] ²	0.9 [4.3]	14.5 [19.9]	t(40) = 3.0, p < .005

¹Data values represent means except where indicated otherwise.
²Antidepressant medications taken were either selective serotonin reuptake inhibitors (SSRIs) or mirtazipine. Antidepressant dosage equivalents are listed in Table 3.

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