Table 2.
Characteristics and VNS settings of the 32 patients with epilepsy at baseline, 8 months’ and 12 months’ follow-up
| Variables | Baseline | 8 months | 12 months | p1 | p2 | p3 |
|---|---|---|---|---|---|---|
| Height (cm) | 158 ± 20 | 160 ± 18 | 159 ± 18 | 0.003 | 0.011 | 0.432 |
| Body weight (kg) | 57.8 ± 20.4 | 59.9 ± 20.4 | 61.7 ± 19.9 | 0.001 | 0.006 | 0.006 |
| BMI (kg/m2) | 22.2 ± 4.0 | 22.5 ± 4.2 | 23.1 ± 4.3 | 0.294 | 0.009 | 0.054 |
| Systolic blood pressure (mmHg) | 115 ± 17 | 111 ± 11 | 113 ± 12 | 0.094 | 0.318 | 0.288 |
| Diastolic blood pressure (mmHg) | 75 ± 11 | 73 ± 11 | 75 ± 9 | 0.436 | 0.658 | 0.260 |
| Amplitude (mA) | – | 1.3 ± 0.5 | 1.5 ± 0.4 | – | – | < 0.001 |
| Pulse width (μs) | – | 500 ± 0 | 500 ± 0 | – | – | 1.000 |
| Frequency (Hz) | – | 30 ± 0 | 30 ± 0 | – | – | 1.000 |
| On time (s) | – | 30 ± 0 | 30 ± 0 | – | – | 1.000 |
| Off time (min) | – | 5 ± 0 | 5 ± 0 | – | – | 1.000 |
p values were provided for comparison as follows: (1) p1: after 8-month VNS vs. baseline; (2) p2: after 12-month VNS vs. baseline; (3) p3: after 12-month VNS vs. after 8-month VNS for all the study subjects