Table 2.
Clinical features of patients diagnosed with VVS and PPS groups in training set.
| Groups | VVS | PPS | Z/x 2 | p-value |
|---|---|---|---|---|
| Patients (n) | 183 | 50 | ||
| DLOC (min) | 2.0 (1.0, 4.0) | 20.0 (5.8, 60.0) | −7.205 | <0.01 |
| Daily frequency of attacks (times) | 1 (1, 1) | 1 (1, 3) | −7.763 | <0.01 |
| Upright posture (Yes/No) | 165/18 (90.2%/9.8%) | 13/37 (26.0%/74.0%) | 89.655 | <0.01 |
| Stuffy environment (Yes/No) | 37/146 (20.2%/79.8%) | 5/45 (10.0%/90.0%) | 2.775 | 0.096 |
| Emotional stress (Yes/No) | 26/157 (14.2%/85.8%) | 12/38 (24.0%/76.0%) | 2.759 | 0.097 |
| FH of syncope (Yes/No) | 34/149 (18.6%/81.4%) | 2/48 (4.0%/96.0%) | 6.390 | 0.011 |
| Precursors (Yes/No) | 132/51 (72.1%/27.9%) | 22/28 (44.0%/56.0%) | 13.868 | <0.01 |
VVS, vasovagal syncope; PPS, psychogenic pseudosyncope; DLOC, duration of loss of consciousness; min, minute; FH, family history.