Table 1.
Demographic and hemodynamic parameters between responders and non-responders to metoprolol in children with POTS in the training set
| Items | Responders | Non-responders | t/Z/χ2 value | P value |
|---|---|---|---|---|
| Number n (%) | 65 (68.4) | 30 (31.6) | NA | NA |
| Sex (M/F) | 33/32 | 11/19 | 1.642 | 0.200 |
| Age (y) | 12.0 (10.0, 13.0) | 13.0 (11.0, 13.0) | −0.919 | 0.358 |
| BMI (kg/cm2) | 20.2 (16.9, 23.8) | 19.0 (16.9, 20.9) | −0.993 | 0.321 |
| Supine HR (bpm) | 77.0 (70.5, 87.5) | 76.5 (71.0, 87.3) | −0.357 | 0.721 |
| SBP (mmHg) | 114.8 ± 13.1 | 113.8 ± 8.5 | 0.376 | 0.708 |
| DBP (mmHg) | 70.0 (61.5, 75.5) | 68.0 (65.8, 73.0) | −0.204 | 0.838 |
| Pre-treatment SS (points) | 7.0 (4.0, 12.0) | 7.5 (4.0, 10.0) | −0.269 | 0.788 |
POTS postural tachycardia syndrome, M/F male/female, BMI body mass index, HR heart rate, bpm beats per minutes, SBP systolic blood pressure, DBP diastolic blood pressure, SS symptom score, NA not available