URDHPBLC // 4-hydroxy-4-(3-pyridyl) butanoic acid, urine Comment Code| 数据集 | nhanes2018 · NHANES 2017-2018 Cycle |
| 类型 | categorical |
| 角色 | |
| 数据文件 | UCOT_J |
| 关键词 |
| 编码 | 含义 |
|---|---|
0 | At or above detection limit |
1 | Below lower detection limit |
2 | Result not obtained, cotinine (URXCOTT) result below 20 ng/mL |