Number of laboratories that participated in each test of urine chemistry in 2018
| Test | Trials | |
|---|---|---|
| 1st | 2nd | |
| Albumin | 166 | 172 |
| Calcium | 151 | 155 |
| Chloride | 177 | 183 |
| Creatinine | 206 | 209 |
| Glucose | 135 | 137 |
| Magnesium | 109 | 108 |
| Phosphorus | 138 | 139 |
| Potassium | 178 | 184 |
| Protein | 173 | 177 |
| Sodium | 180 | 186 |
| Urea nitrogen | 152 | 156 |
| Uric acid | 145 | 146 |
| Urine human chorionic gonadotropin (qualitative) | 210 | 215 |