Table 7.
Time domain of heart rate variability in normal weight and obese groups. Mean ± SE (median, minimum-maximum) are reported.
| Parameters | Normal Weight Group (n = 15) | Obese Group (n = 15) | ||
|---|---|---|---|---|
| Mean NN | 638.90 ± 45.24 | (602.50, 491–968) | 511.44 ± 33.90 * | (567.00, 302–615) |
| SDNN | 167.20 ± 12.76 | (165.00, 100–236) | 93.11 ± 8.68 * | (92.00, 52–141) |
| SDANN | 113.70 ± 18.71 | (108.00, 45–255) | 41.89 ± 8.68 * | (36.00, 12–97) |
| ASDNN | 127.30 ± 9.92 | (127.00, 77–196) | 81.00 ± 6.41 * | (85.00, 44–106) |
| RMSSD | 62.50 ± 5.93 | (57.50, 35–105) | 44.67 ± 4.93 * | (45.00, 20–66) |
| pNN50 | 39.05 ± 4.57 | (37.05, 15.1–66.7) | 25.40 ± 5.12 | (24.4, 2.8–48.3) |
* p-value < 0.05 vs. normal weight group. Mean NN, average NN intervals; SDNN, standard deviation of all NN intervals; SDANN, standard deviation of the averages of NN intervals in all 5 min segments of the entire recording; ASDNN, average standard deviation of all 5 min R-R intervals; RMSSD, square root of the mean of the sum of the squares of differences between adjacent NN intervals; pNN50, percentage of successive NN intervals > 50 ms.