Table 1.
Baseline Demographic Properties and HRV Parameters of Study Subjects
| Variable | Smokers | Nonsmokers | P Values |
|---|---|---|---|
| Number | 24 | 22 | NS |
| Age (years) | 24 ± 5 | 22 ± 3 | NS |
| Body mass index (kg/m2) | 23 ± 4 | 25 ± 3 | NS |
| Systolic blood pressure (mmHg) | 116 ± 7 | 117 ± 6 | NS |
| Diastolic blood pressure (mmHg) | 71 ± 6 | 69 ± 8 | NS |
| Cigarettes/day | 29 ± 5 | – | |
| Years of smoking | 11 ± 4 | – | |
| RR | 815 ± 102 | 808 ± 96 | NS |
| SDNN | 64 ± 10 | 78 ± 22 | P < 0.05 |
| RMSSD | 35 ± 12 | 54 ± 30 | P < 0.05 |
| LF | 184 ± 59 | 162 ± 52 | NS |
| HF | 172 ± 84 | 205 ± 76 | NS |
| LF/HF | 1.3 ± 0.6 | 0.9 ± 0.5 | P < 0.05 |
NS = statistically not significant.
Abbreviations as in text.