Table 3 Variables according to age groups (BS = before syncope, BP = blood pressure, AS = after syncope)
From: PR interval as a predictor of syncope in tilt-up testing in adolescents and young adults
Variable | Age groups (years) | TOTAL | p | ||
|---|---|---|---|---|---|
12-15 n = 53 | 16-18 n = 54 | 19–30 n = 35 | 12-30 n = 142 | ANOVA | |
Female (%) | 37 (69.81%) | 40 (74.07%) | 26 (74.28%) | 103 (72.53%) | |
PR interval (ms) | 142.8 ± 3.2 | 147.7 ± 2,7 | 149.4 ± 3.6 | 146.3 ± 1.8 | 0.183 |
PR interval BS (ms) | 103.2 ± 2.1 | 109.1 ± 2.5 | 112.6 ± 2.5 | 107.7 ± 1.7 | 0.046 |
PR shortening (%) | 27.6 ± 1.4 | 25.8 ± 2.3 | 24.4 ± 1.7 | 26.1 ± 0.8 | 0.155 |
PR interval AS (ms) | 132.6 ± 1.8 | 135.4 ± 2.1 | 140.0 ± 2.2 | 135.5 ± 2.0 | 0.185 |
QT interval (ms) | 360.6 ± 3.9 | 362.9 ± 3.5 | 368.8 ± 3.1 | 363.5 ± 2.1 | 0.136 |
BMI (kg/m2) | 21.8 ± 1.2 | 21.2 ± 0.9 | 22.5 ± 1.1 | 21.8 ± 0.6 | NS |
HR preparation (bpm) | 78.5 ± 1.9 | 73.4 ± 1.5 | 71.8 ± 1.9 | 74.9 ± 1.1 | 0.023 |
HR orthostatic (bpm) | 105 ± 2.2 | 96.8 ± 1.9 | 91 ± 2.2 | 98.7 ± 1.3 | 0.00003 |
HR change (bpm) | 26.9 ± 1.7 | 23.4 ± 1.6 | 19.4 ± 2.2 | 23.7 ± 1.1 | 0.008 |
Time of syncope (min) | 20.8 ± 1.5 | 20.5 ± 1.5 | 16.1 ± 1.6 | 19.6 ± 0.9 | 0.037 |