TABLE 2.
Number of studies and participants reporting 24‐hurinary or plasma tests to determine catecholamines or their metabolites, and blood pressure
| Studies (n) | Participants (n) | |
|---|---|---|
| Randomized controlled trials (n = 14) | Case/control | |
| 24‐h urinary noradrenaline | 9 | 186/180 |
| 24‐h urinary adrenaline | 6 | 140/135 |
| 24‐h urinary normetadrenaline | 3 | 92/87 |
| 24‐h urinary metadrenaline | 2 | 41/36 |
| Plasma noradrenaline | 5 | 24/23 |
| Plasma adrenaline | 3 | 46/39 |
| Blood pressure | 10 | 208/199 |
| Prospective cohort studies (n = 24) | ||
| 24‐h urinary noradrenaline | 13 | 367 |
| 24‐h urinary adrenaline | 7 | 173 |
| 24‐h urinary normetadrenaline | – | – |
| 24‐h urinary metadrenaline | – | – |
| Plasma noradrenaline | 13 | 269 |
| Plasma adrenaline | 6 | 85 |
| Blood pressure | 10 | 297 |
NB: Some studies reported more than one test.