Evidence-Based Complementary and Alternative Medicine / 2015 / Article / Tab 4

Research Article

Efficacy and Safety of Acupuncture for Acute Low Back Pain in Emergency Department: A Pilot Cohort Study

Table 4

Comparison of parameters of heart rate variability (HRV) before and after intervention in two groups.

Group BeforeAfter value
 MedianMedian

Control
()
HRV39.0 33.0 49.0 31.0 26.0 45.0 0.311
HF%50.0 38.0 58.0 53.0 48.0 76.0 0.421
LF%50.0 42.0 62.0 47.0 24.0 52.0 0.421
LF/HF1.0 0.7 1.6 0.9 0.3 1.1 0.133
VLF976.0 567.0 1436.0 628.0 501.0 1098.0 0.463
Number of irreg. hb.8.0 0.0 48.0 2.0 0.0 13.0 0.229
LF305.0 92.0 509.0 154.0 54.0 199.0 0.552
HF258.0 196.0 323.0 224.0 133.0 428.0 0.916
Total power1521.0 1089.0 2401.0 961.0 676.0 2025.0 0.311
Variance1521.0 1089.0 2401.0 961.0 676.0 2025.0 0.311
RMSSD45.0 29.0 52.0 41.0 22.0 54.0 0.674
PNN5013.0 8.0 30.0 20.0 1.0 30.0 0.753

Acupuncture
()
HRV40.0 25.0 83.0 34.0 24.0 58.0 0.273
HF%45.0 32.0 61.0 46.0 32.0 60.0 0.694
LF%55.0 39.0 68.0 53.0 39.0 68.0 0.905
LF/HF1.2 0.6 2.1 1.1 0.7 2.1 0.923
VLF891.0 382.0 4272.0 732.0 423.0 2274.0 0.561
Number of irreg. hb.11.0 0.0 49.0 6.5 0.0 22.0 0.158
LF204.0 77.0 1095.0 185.0 53.0 667.0 0.891
HF208.0 68.0 932.0 141.5 71.0 503.0 0.446
Total power1600.0 625.0 6889.0 1157.0 576.0 3364.0 0.401
Variance1600.0 625.0 6889.0 1157.0 576.0 3364.0 0.401
RMSSD34.0 22.0 75.0 32.0 22.0 59.0 0.573
PNN5011.0 1.0 45.0 8.5 2.0 31.0 0.353

value by Wilcoxon Signed Ranks Test.
: Percentile 25.
: Percentile 75.
HF, high frequency; LF, low frequency; VLF, very low frequency; Number of irreg. hb., number of irregular heart beats; RMSSD, root mean square successive difference; PNN50, NN50 count divided by the total number of all NN intervals.