Table 2.
Comparison of HRV measures between obese (n=30) and normal weight (n=29) groups
| Variables | Obese (n=30) median (Q1–Q3) | Normal weight (n=29) median (Q1–Q3) | p-Value |
|---|---|---|---|
| SDNN (ms) | 35.55 (26.77–49.25) | 46.15 (37.22–58.57) | 0.038 |
| RMSSD (ms) | 28.75 (16.72–38.35) | 41.55 (30.6–56.75) | 0.018 |
| NN50 count | 15.5 (2–39) | 83.5 (32.75–116.25) | 0.010 |
| PNN50% | 6.4 (0.5–17.33) | 25.65 (11.42–40.5) | 0.012 |
| LF ms2 | 248 (110.75–465) | 480 (187–953) | 0.063 |
| HF ms2 | 216 (103.5–530) | 640.5 (300.75–1219.75) | 0.014 |
| LF% | 26.15 (21.6–36.55) | 27.85 (18.62–36.92) | 0.921 |
| HF% | 23 (12.15–45.28) | 34.3 (23.57–45.25) | 0.192 |
| LF nu | 54.5 (39.65) | 44.1 (33.75–54.82) | 0.079 |
| HF nu | 45.5 (31.3–60.35) | 55.9 (45.17–66.25) | 0.079 |
| LF/HF | 1.2 (0.65–2.20) | 0.79 (0.5–1.02) | 0.045 |
| SD1 | 21.55 (11.82) | 29.45 (21.65–40.2) | 0.042 |
| SD2 | 45.30 (32.85–60.03) | 60.4 (45–70.77) | 0.07 |
| SD1/SD2 | 0.46 (0.33–0.53) | 0.49 (0.39–0.61) | 0.246 |
Note: Values in bold indicate statistical significance.
Abbreviations: HF%, high frequency percent; HF, high frequency; LF%, low frequency percent; LF, low frequency; HF nu, high frequency normalized unit; HRV, heart rate variability; LF nu, low frequency normalized unit; NN50 count, number of RR intervals that differ by >50 ms; PNN50%, percentage of consecutive RR intervals that differ by >50 ms; Q1–Q3, interquartile range; RMSSD, root mean square of differences of successive RR intervals; SD1, Poincare plot SD1; SD1/SD2, SD1:SD2 ratio; SD2, Poincare plot SD2; SDNN, standard deviation of all RR intervals.