Table 3.
Heart rate variability analysis of the chiropractic adjustment–only group over a 4-week period
| Mean NN | Mean HRT | SDNN | RMSSD | Total Power | VLF | LF | HF | LFNorm | HFNorm | LF/HF | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Baseline | |||||||||||
| Mean | 851.8375 | 72.88225 | 139.6731 | 150.7414 | 272457.2 | 230832.7 | 34890.45 | 6733.984 | 71.91562 | 28.08438 | 4.524799 |
| SD | 177.0228 | 12.82346 | 254.3074 | 321.5155 | 1048830 | 892005 | 132306.6 | 24523.06 | 20.62763 | 20.62764 | 3.463004 |
| Fourth week | |||||||||||
| Mean | 796.0744 | 77.09393 | 63.21569 | 54.80205 | 1743.116 | 806.7853 | 583.3312 | 352.9991 | 67.8913 | 32.10872 | 3.571344 |
| SD | 120.2323 | 12.77549 | 41.44921 | 40.62335 | 2537.489 | 1557.976 | 604.0656 | 504.6002 | 17.3477 | 17.34768 | 3.688321 |
| t Test | 0.13467 | 0.176416 | 0.237125 | 0.258253 | 0.338139 | 0.338501 | 0.337384 | 0.329042 | 0.796787 | 0.796787 | 0.659978 |
Mean NN, normal to normal; HRT, heart rate; SDNN, standard deviation of normal to normal interval; RMSSD, square root of the mean squared differences of successive NN interval; VLF, very low frequency; LF, low frequency; HF, high frequency; LFNorm, normalized low frequency; HFNorm, normalized high frequency.