Table 4.

Group differences between HRV variables are not affected by race or age.

HRV Variables	Unadjusted Group Differences (P-value)	Dysmenorrhea vs HC, Controlling for Race (P-value)	BPS vs HC, Controlling for Age (P-value)
Systolic BP	0.317	0.188	0.375
Diastolic BP	0.006	0.005	0.016
Heart Rate	0.001	0.005	0.001
LF-HRV	0.084	0.125	0.125
RMSSD	0.005	0.014	0.006
HF-HRV	0.001	0.025	0.001

P-values for group differences and for posthoc ANCOVA comparisons controlling for race and age, with regards to dysmenorrheic and BPS participants respectively, are shown. The effect of group differences on each factor was analyzed with an unadjusted one-way ANOVA. P-values are also shown for posthoc ANCOVA to evaluate the significant differences between dysmenorrhea vs healthy controls controlling for African American status. P-values are also shown for posthoc ANCOVA to evaluate the significant differences between BPS vs healthy controls controlling for age. Significantly different factors are bolded (p < 0.05). There was not a significant effect of African American status or age on primary outcome variables.