Number of laboratories that participated in each test of general chemistry in 2018
| Test | Trials | |||
|---|---|---|---|---|
| 1st | 2nd | 3rd | 4th | |
| Alanine aminotransferase | 1,568 | 1,639 | 1,676 | 1,660 |
| Albumin | 1,443 | 1,512 | 1,548 | 1,534 |
| Alkaline phosphatase | 1,385 | 1,451 | 1,479 | 1,467 |
| Amylase | 800 | 825 | 820 | 814 |
| Aspartate aminotransferase | 1,567 | 1,638 | 1,675 | 1,659 |
| Bilirubin, direct | 782 | 813 | 813 | 809 |
| Bilirubin, total | 1,456 | 1,521 | 1,557 | 1,543 |
| Calcium | 698 | 724 | 736 | 734 |
| Chloride | 991 | 1,034 | 1,051 | 1,046 |
| Cholesterol, total | 1,557 | 1,626 | 1,662 | 1,646 |
| Creatine kinase | 652 | 667 | 676 | 673 |
| Creatinine | 1,520 | 1,595 | 1,640 | 1,628 |
| Gamma-glutamyl transpeptidase | 1,520 | 1,588 | 1,622 | 1,608 |
| Glucose | 1,543 | 1,614 | 1,651 | 1,635 |
| High density lipoprotein cholesterol | 1,443 | 1,501 | 1,533 | 1,519 |
| Iron | 403 | 416 | 421 | 419 |
| Lactate dehydrogenase | 871 | 899 | 916 | 909 |
| Lipase | 392 | 399 | 408 | 403 |
| Low density lipoprotein cholesterol | 880 | 911 | 920 | 916 |
| Magnesium | 280 | 283 | 290 | 290 |
| Osmolality | 146 | 151 | 151 | 149 |
| Phosphorus | 649 | 676 | 693 | 687 |
| Potassium | 1,004 | 1,048 | 1,064 | 1,060 |
| Protein, total | 1,429 | 1,494 | 1,529 | 1,516 |
| Sodium | 1,004 | 1,048 | 1,064 | 1,060 |
| Total CO2 | 201 | 209 | 216 | 214 |
| Total iron-binding capacity | 367 | 376 | 382 | 381 |
| Triglyceride | 1,515 | 1,587 | 1,617 | 1,601 |
| Urea nitrogen | 1,499 | 1,570 | 1,602 | 1,591 |
| Uric acid | 1,185 | 1,242 | 1,262 | 1,254 |
| Estimated glomerular filtration rate, adult | 279 | 287 | 295 | 293 |
| Estimated glomerular filtration rate, child | 180 | 184 | 189 | 193 |