Baseline characteristics of study population stratified by incident hospital admission for OH or unexplained syncope during follow-up
| Characteristic | No OH/syncope hospitalisation n=29 500 | OH hospitalisation n=504 | Unexplained syncope hospitalisation n=524 | p Value |
| Age (years) | 57±8 | 63±7 | 62±7 | <0.001 |
| Sex (male, %) | 37.5 | 47.4 | 50.0 | <0.001 |
| Body mass index (kg/m2) | 26±4 | 26±4 | 27±4 | <0.001 |
| Systolic BP (mm Hg) | 141±20 | 147±21 | 148±21 | <0.001 |
| Diastolic BP (mm Hg) | 86±10 | 87±10 | 88±10 | <0.001 |
| Hypertension (%) | 61.0 | 70.6 | 74.4 | <0.001 |
| AHT (%) | 17.1 | 24.8 | 27.7 | <0.001 |
| Diabetes (%) | 3.4 | 7.4 | 5.6 | <0.001 |
| Current smoking (%) | 28.4 | 24.6 | 25.1 | 0.053 |
| Prevalent CVD (%) | 4.4 | 7.9 | 9.7 | <0.001 |
| Prevalent cancer (%) | 6.2 | 6.9 | 5.2 | 0.48 |
AHT, antihypertensive treatment; BP, blood pressure; CVD, cardiovascular disease; OH, orthostatic hypotension.