Effect of spinal manipulative treatment on cardiovascular autonomic control in patients with acute low back pain

Table 1 Average scores of cardiovascular baseline components before treatment measured during the two sessions of treatments between SMT and SHAM

Autonomic cardiac components (n = 17)	SMT (n = 10)	SHAM (n = 7)	Significance
RR period (ms)	826 (47)	847 (43)	0.481
RMSSD (ms)	38.9 (2.18)	39.2 (2.3)	0.931
Log LF-RR (ms²)	3.08 (0.06)	3.10 (0.09)	0.652
Log HF-RR (ms²)	3.00 (0.04)	3.10 (0.04)	0.151
LF/HF	1.26 (0.15)	1.08 (0.16)	0.429
100.LF/(LF + HF) %	54.3 (2.7)	50.4 (3.5)	0.393
100.HF/(LF + HF) %	46.7 (2.7)	49.6 (3.5)	0.393
SBP (mm Hg)	118 (4)	122 (2)	0.422
LF-SBP (mm²Hg)	11.15 (0.75)	12.78 (0.71)	0.151
HF-SBP (mm²Hg)	1.44 (0.31)	2.02 (0.39)	0.254
LF-BRS gain	14.20 (1.12)	13.84 (1.05)	0.826
HF-BRS gain	20.21 (2.35)	21.42 (2.10)	0.720

There is no significant difference between groups (SMT vs. SHAM)
SMT spinal manipulative treatment, RMSSD root mean square of the successive differences, LF low frequency, HF high frequency, SBP systolic blood pressure, BRS baroreflex sensitivity. Data are presented as mean (SEM)