Table 2.
Number of laboratory tests ordered per 1000 age-adjusted patients.a
| Type of laboratory test | Total annual number | Mean number per physician Mean (SD) |
|---|---|---|
| Complete blood count | 262 918 | 851.5 (257.1) |
| Urea | 215 327 | 673.9 (195.7) |
| Glutamine oxaloacetate transaminase | 171 747 | 542.9 (137.8) |
| Total cholesterol | 149 205 | 470.6 (99.2) |
| International normalised ratio | 95 216 | 292.8 (133.6) |
| Thyroid-stimulating hormone | 76 772 | 251.9 (96.1) |
| Vitamin B12 | 41 789 | 134.0 (83.3) |
| Haemoglobin A1c | 33 087 | 103.8 (28.0) |
| C-reactive protein | 12 562 | 40.0 (17.4) |
| Prostate-specific antigen | 12 132 | 37.7 (20.9) |
| Antinuclear factor | 6154 | 19.8 (11.8) |
| Rheumatoid factor | 6040 | 19.6 (10.5) |
| Carcinoembryonic antigen | 5937.00 | 18.4 (10.0) |
| Helicobacter pylori antibodies | 5075 | 16.7 (13.9) |
| CA 15-3 | 3740 | 11.8 (7.3) |
| Epstein-Barr virus antibodies | 2717 | 10.1 (10.8) |
a
Age-adjusted number of patients allocated to each physician was calculated according to the number of allocated patients, age distribution, and the capitation formula of the National Insurance Institute of Israel, which gives a different weight for each age group according to its health services utilisation.