Number of laboratories that participated in each test of urine chemistry in 2019
| Test | Trials | |
|---|---|---|
| 1st | 2nd | |
| Albumin | 183 | 184 |
| Calcium | 161 | 158 |
| Chloride | 188 | 182 |
| Creatinine | 220 | 218 |
| Glucose | 140 | 138 |
| Magnesium | 111 | 111 |
| Phosphorus | 143 | 141 |
| Potassium | 189 | 183 |
| Protein | 190 | 189 |
| Sodium | 191 | 186 |
| Urea nitrogen | 163 | 161 |
| Uric acid | 155 | 151 |
| Urine human chorionic gonadotropin (qualitative) | 241 | 242 |