Fig. 1From: Impact of heart rate variability, a marker for cardiac health, on lupus disease activityAssociation of baseline disease activity with sympathovagal balance measured as the low frequency to high frequency (LF/HF) ratio by univariate linear regression. a The British Isles Lupus Assessment Group (BILAG) index is inversely related to the LF/HF ratio (p = 0.024). Inverse trends were observed for b Systemic Lupus Erythematosus Disease Activity Index (SLEDAI) (p = 0.073) and c physician global assessment (PGA) (p = 0.062)Back to article page