Investigation | Estimated yield (%) |
Full blood count | 1 |
ESR/plasma viscosity | 2 |
Urea and electrolytes | 3 |
Plasma glucose | 5 |
Plasma cholesterol | 45 |
Urinalysis | 5 |
ECG (12 lead) | 17 |
Unenhanced CT brain scan | 20 |
ESR, erythrocyte sedimentation rate; ECG, electrocardiogram; CT computed tomography.