Table 2.
Relation between patient characteristics and electrocardiographic parameters to BMI of included healthy volunteers
| Body mass index (kg/m2) | |||||
|---|---|---|---|---|---|
| 18.5–20.7 (n = 323) |
20.8–22.0 (n = 334) |
22.1–23.4 (n = 324) |
23.5–25.0 (n = 309) |
25.1–30.0 (n = 255) |
|
| Corresponding group | α | ß | γ | δ | ε |
| Age (years) | 22.2 ± 2.93 γ δ ε | 22.6 ± 3.02 | 23.0 ± 2.93 α | 23.1 ± 3.05 α | 23.1 ± 2.89 α |
| Gender (% male) | 70.0 | 72.8 | 76.5 | 75.4 | 77.5 |
| Temperature (°C) | 36.7 ± 0.35 | 36.7 ± 0.40 | 36.7 ± 0.40 | 36.7 ± 0.39 | 36.8 ± 0.39 |
| Systolic blood pressure (mm Hg) | 117 ± 10.2 γ δ ε | 119 ± 10.5 ε | 120 ± 9.63 α ε | 121 ± 10.0 α | 123 ± 10.0 α ß γ |
| Diastolic blood pressure (mm Hg) | 67.9 ± 7.77 | 68.3 ± 7.74 | 68.6 ± 7.68 | 68.4 ± 7.50 | 69.1 ± 8.34 |
| Ventricular rate (beats/min) | 64.4 ± 9.99 | 62.7 ± 9.69 | 62.5 ± 10.6 | 62.6 ± 9.83 | 64.7 ± 10.6 |
| Serum Sodium (mmol/l) | 141 ± 1.82 | 141 ± 1.90 | 141 ± 1.92 | 141 ± 1.85 | 141 ± 1.91 |
| Serum Potassium (mmol/l) | 4.31 ± 0.33 | 4.33 ± 0.31 | 4.33 ± 0.29 | 4.36 ± 0.30 | 4.33 ± 0.30 |
| Serum Calcium (mmol/l) | 2.42 ± 0.09 | 2.42 ± 0.09 | 2.41 ± 0.09 | 2.42 ± 0.09 | 2.42 ± 0.10 |
| Maximum P-wave duration (ms) | 99.09 ± 10.4 δ ε | 100.5 ± 11.5 δ ε | 101.2 ± 10.7 ε | 102.9 ± 10.6 α ß | 103.8 ± 11.1 α ß γ |
| P-wave balance in lead V1 (µV) | 0.31 ± 0.45 δ ε | 0.32 ± 0.42 δ ε | 0.33 ± 0.43 | 0.41 ± 0.41 α ß | 0.42 ± 0.35 α ß |
| P-wave dispersion (ms) | 51.5 ± 20.8 | 53.6 ± 19.9 | 52.0 ± 21.0 | 51.7 ± 21.3 | 50.9 ± 20.9 |
| Total P-wave area in lead V1 (mm*ms) | 47.53 ± 82.6 δ ε | 47.15 ± 76.3 δ ε | 50.50 ± 79.5 δ ε | 67.91 ± 80.0 α ß γ | 70.96 ± 74.0 α ß γ |
| PR interval (ms) | 146.9 ± 18.1 γ δ ε | 149.9 ± 21.9 | 152.2 ± 21.0 α | 151.5 ± 20.7 α | 153.1 ± 19.0 α |
| QRS duration (ms) | 96.0 ± 10 | 96.4 ± 10 | 97.7 ± 10 | 97.0 ± 10 | 96.9 ± 10 |
| Heart axis (degrees) | 68.65 ± 25.8 γ δ ε | 63.90 ± 26.0 δ ε | 59.77 ± 27.0 α ε | 54.57 ± 28.3 α ß | 51.91 ± 28.2 α ß γ |
| Sokolow-Lyon voltage (mm) | 28.02 ± 8.28 | 27.30 ± 7.78 | 27.83 ± 8.27 | 26.80 ± 7.69 | 26.77 ± 7.66 |
| Cornell product (mm*µV) | 11.45 ± 6.29 | 12.29 ± 6.52 | 12.47 ± 6.21 | 11.74 ± 5.78 | 12.07 ± 6.09 |
| Maximum T‑wave duration (ms) | 183 ± 20 | 184 ± 20 | 182 ± 20 | 183 ± 20 | 181 ± 21 |
| Minimum T‑wave duration (ms) | 107 ± 54 | 115 ± 52 | 110 ± 49 | 114 ± 51 | 109 ± 50 |
| T-wave dispersion (µV) | 75.9 ± 54.7 | 69.4 ± 52.9 | 72.5 ± 54.7 | 68.3 ± 51.8 | 72.4 ± 50.5 |
| QTcF duration (ms) | 404.8 ± 17 | 406.7 ± 18 | 405.4 ± 18 | 405.1 ± 19 | 404.0 ± 19 |
Categorical variables were compared using chi-squared test, variances were compared using the Analysis of Variance test with a post hoc Tukey analysis. Results are reported as mean ± SD or as percentage. The symbols α, ß, γ, δ, and ε represent a significant difference (P < 0.05) compared with that group. If no symbols are present, no significance was found between the groups
mV millivolt, µV microvolt, ms milliseconds, mm millimetres