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
ć
Before
After
value
ć
Median
Median
Control ()
HRV
39.0
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/HF
1.0
0.7
1.6
0.9
0.3
1.1
0.133
VLF
976.0
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
LF
305.0
92.0
509.0
154.0
54.0
199.0
0.552
HF
258.0
196.0
323.0
224.0
133.0
428.0
0.916
Total power
1521.0
1089.0
2401.0
961.0
676.0
2025.0
0.311
Variance
1521.0
1089.0
2401.0
961.0
676.0
2025.0
0.311
RMSSD
45.0
29.0
52.0
41.0
22.0
54.0
0.674
PNN50
13.0
8.0
30.0
20.0
1.0
30.0
0.753
Acupuncture ()
HRV
40.0
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/HF
1.2
0.6
2.1
1.1
0.7
2.1
0.923
VLF
891.0
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
LF
204.0
77.0
1095.0
185.0
53.0
667.0
0.891
HF
208.0
68.0
932.0
141.5
71.0
503.0
0.446
Total power
1600.0
625.0
6889.0
1157.0
576.0
3364.0
0.401
Variance
1600.0
625.0
6889.0
1157.0
576.0
3364.0
0.401
RMSSD
34.0
22.0
75.0
32.0
22.0
59.0
0.573
PNN50
11.0
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.
