HRV analysis in smokers and in normal controls
| Measure | Smokers (n=31) | Controls (n=15) | p Value |
|---|---|---|---|
| HRV index | 15.2±5.3 | 19.4±3.6 | 0.02 |
| SDNN | 116.7±41.2 | 126.9±23.3 | 0.18 |
| SDANN | 109.5±42.5 | 116.0±17.7 | 0.27 |
| RMSSD | 36.1±16.9 | 34.9±19.9 | 0.67 |
HRV index, heart rate variability index (total count of NN intervals divided by the histogram height); RMSSD, root mean square value of square differences between neighboring NN intervals; SDANN, standard deviation of average NN intervals during 5 min monitoring; SDNN, standard deviation of all NN intervals.