Why the study?
Does depression reduce heart rate variability in firefighters?
Population
107 firefighters
Comparison
Depression (assessed by Beck Depression Inventory) vs Non-depressed firefighters
Design
Cross-sectional
Authors
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Depression-associated lower RMSSD in firefighters may signal elevated cardiac risk; hypothesis-generating and requires longitudinal studies before clinical implications.
Does depression reduce heart rate variability in firefighters?
Depression is associated with decreased heart rate variability (vagal tone) in firefighters, suggesting a possible mechanism for increased sudden cardiac death risk in this population.
Liao et al. (2014) studied this question.
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