Table 1.

Demographic information for study participants

Measure	PD (n=32)	Control (n=34)	P value
	M (SD)	M (SD)
Age (years)	21.36 (2.10)	20.61 (2.14)	0.157
Age at menarche	11.81 (1.23)	12.00 (1.41)	0.570
BSI – somatization	2.94 (3.08)	1.44 (1.33)	0.052*
BSI – depression	3.69 (3.75)	3.77 (4.41)	0.939
BSI – anxiety	3.19 (2.98)	2.35 (3.34)	0.289
BSI – global	9.81 (7.68)	7.56 (8.11)	0.252
	n (% of group)	n (% of group)
Race
White	16 (50.0)	13 (38.2)	0.451
African-American	4 (12.5)	3 (8.8)
Asian	12 (37.5)	18 (52.9)
Ethnicity			0.034
Not Hispanic/Latino	20 (62.5)	29 (85.3)
Hispanic/Latino	12 (37.5)	5 (14.7)

^*Note. Analyzed with Wilcoxon two sample test, otherwise two-sample t-test was used.

PD = Primary Dysmenorrhea; BSI = Brief Symptom Inventory 18-Item Version.