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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