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Table 2 Effects of treatment (SMT vs. SHAM) and experimental period (D1 vs. D7) on cardiovascular components

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

Autonomic cardiac components (n = 17) Normality test Treatment   Period Significance
SMT (n = 10) SHAM (n = 7) Significance D1 (n = 17) D7 (n = 17)
ΔRR period (ms) Failed 47.14 (19.06) 36.97 (22.78) 0.735 64.34 (21.00) 19.77 (21.00) 0.144
ΔRMSSD (ms) Passed 12.70 (1.93) 2.85 (2.31) 0.003* 7.94 (2.13) 7.61 (2.13) 0.912
ΔLog LF-RR (ms2) Passed 155.57 (81.49) −5.26 (97.40) 0.21 25.52 (89.80) 124.79 (89.80) 0.441
ΔLog HF-RR (ms2) Passed 223.08 (74.80) −125.24 (89.40) 0.006* 109.22 (82.42) −11.38 (82.42) 0.309
ΔLF/HF Passed −0.10 (0.11) 0.14 (0.13) 0.160 −0.07 (0.12) 0.12 (0.12) 0.258
Δ100.LF/(LF + HF) % Passed −0.02 (0.02) 0.03 (0.028) 0.155 −0.01 (0.02) 0.02 (0.02) 0.226
Δ100.HF/(LF + HF) % Passed 0.02 (0.02) −0.03 (0.028) 0.155 0.01 (0.02) −0.02 (0.02) 0.226
ΔSBP (mm Hg) Passed 7.32 (2.87) 3.66 (3.43) 0.420 2.42 (3.16) 8.56 (3.16) 0.180
LF-SBP (mm2Hg) Passed −0.42 (0.88) 0.03 (1.06) 0.745 −0.58 (0.97) 0.19 (0.97) 0.576
ΔHF-SBP (mm2Hg) Failed 0.759 (0.417) 0.63 (0.49) 0.846 0.73 (0.46) 0.66 (0.46) 0.916
ΔLF-BRS gain Passed −0.23 (1.03) 0.22 (1.24) 0.777 −0.94 (1.14) 0.93 (1.14) 0.255
ΔHF-BRS gain Passed 8.10 (1.45) 0.30 (1.73) 0.002* 4.34 (1.60) 4.06 (1.60) 0.902
  1. Δ, difference between POST and PRE treatment, 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). Boldface * represent p < 0.05