Table 5.
Outcomes | Log local PPT (kPa) N = 41 | Distal PPT (kPa) N = 37 | |||||
---|---|---|---|---|---|---|---|
Post 1 − Baseline | Post 2 − Baseline | Post 3 − Baseline | Post 1 − Baseline | Post 2 − Baseline | Post 3 − Baseline | ||
RRi (ms) | SM | − 0.021† | − 0.003 | 0.012 | − 0.332 | − 0.071 | 0.097 |
N = 41 | Sham | − 0.237 | − 0.168 | − 0.098† | 0.014 | − 0.065 | 0.103† |
Log HF-HRV (ms2) | SM | − 0.212† | 0.073 | − 0.034 | − 0.067 | 0.007 | 0.070 |
N = 41 | Sham | − 0.124 | − 0.028† | − 0.184† | − 0.038 | − 0.062† | 0.047 |
HF normalized unit | SM | − 0.266† | − 0.049 | − 0.058 | − 0.037 | − 0.013 | 0.211 |
N = 41 | Sham | − 0.087 | 0.065 | − 0.167† | − 0.308 | − 0.026 | − 0.300 |
Log LF-HRV (ms2) | SM | 0.120† | 0.126 | 0.077 | − 0.012† | − 0.015 | − 0.127 |
N = 41 | Sham | − 0.010 | − 0.205 | 0.134† | 0.220 | − 0.020 | 0.451 |
Log LF/HF | SM | 0.296† | 0.045 | 0.116 | 0.056† | − 0.020 | − 0.200 |
N = 41 | Sham | 0.079 | − 0.083 | 0.219† | 0.262 | 0.036 | 0.376 |
Log RMSSD (ms) | SM | − 0.204† | 0.161† | 0.086† | − 0.102† | 0.015† | 0.046† |
N = 41 | Sham | − 0.139 | − 0.006† | − 0.191† | − 0.142 | − 0.041† | 0.074 |
Log SDNN (ms) | SM | − 0.188† | 0.077 | − 0.081 | − 0.001 | 0.114 | − 0.024 |
N = 41 | Sham | − 0.160 | − 0.041 | − 0.263† | − 0.062 | − 0.145 | − 0.024 |
SBP (mmHg) | SM | 0.141† | 0.081 | 0.087 | 0.209† | 0.137 | 0.343 |
N = 30 | Sham | 0.165 | 0.247 | 0.336† | 0.412 | 0.509 | 0.581 |
DBP (mmHg) | SM | − 0.010† | − 0.022 | 0.015 | − 0.094 | 0.097 | 0.024 |
N = 30 | Sham | 0.153 | 0.094 | 0.190† | 0.020 | 0.343 | 0.266 |
MBP (mmHg) | SM | 0.040† | 0.012 | 0.046 | − 0.052 | 0.156 | 0.165 |
N = 30 | Sham | 0.149 | 0.138 | 0.187† | 0.058 | 0.428 | 0.380 |
LF-SBP (mm2Hg) | SM | 0.278† | 0.142 | 0.164 | 0.062† | 0.007 | − 0.236 |
N = 30 | Sham | 0.181 | − 0.038† | 0.090† | 0.379 | 0.043† | 0.058 |
Notes
- Statistically significant correlations at p < 0.006 (Bonferroni correction) are bold faced
- † Spearman’s correlation coefficients
- Pearson’s correlation coefficients unless contrary mention
- For correlations between blood pressure and distal PPT results were based (i) on 27 subjects for Post 1 - Baseline and Post 2 - Baseline and (ii) on 25 subjects for Post 3 - Baseline
Abbreviations:
SM Spinal manipulation, RRi intervals between normal beats; Log logarithm with base 10; HF high frequency; HF normalized unit: HF/(HF + LF)×100; LF low frequency; RMSSD root mean square of the successive differences between normal heartbeats; SDNN standard deviation of the inter beat interval of normal sinus beats; SBP systolic blood pressure; DBP diastolic blood pressure; MBP mean blood pressure; PPT pressure pain threshold in kilopascal