The effect of spinal manipulative therapy and home stretching exercises on heart rate variability in patients with persistent or recurrent neck pain: a randomized controlled trial

Table 4 Difference in the regression slope for each time point for intervention and control, control group as reference (n = 123)

Group × time	Treatment effect (unadjusted)
Group × time	B	P value	95% CI
R-R (ms)	0.1	0.997	− 17.2	17.4
RMSSD (ms)	0.4	0.829	− 3.1	3.9
SDNN (ms)	0.8	0.548	− 1.8	3.4
LF (ms²)	44.2	0.482	− 79.4	167.8
HF (ms²)	− 12.5	0.746	− 88.3	63.3
LF/HF	0.2	0.498	− 0.5	0.9
Total Power (ms²)	23.1	0.791	− 148.2	194.4

R-R mean R-R interval, RMSSD root mean square of successive differences, SDNN standard deviation of normal to normal, LF low frequency, HF high frequency, LF/HF LF/HF ratio

ISSN: 2045-709X