Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Interaction effects between experiencing the death of a family member and sleep quality on (a) RMSSD and (b) HF-HRV. Solid line indicates individuals with good sleep quality and dotted line indicates individuals with poor sleep quality. All HRV values were natural log-transformed. RMSSD = root mean squared successive differences; HF-HRV = high frequency HRV; n.s. = not significant. **p < .01.
