idu30 // How long has it been since you last used a needle to inject drugs?| 数据集 | gss2022 · General Social Survey 2022 |
| 类型 | categorical |
| 角色 | |
| 数据文件 | |
| 关键词 |
| 编码 | 含义 |
|---|---|
1 | within the past 30 days |
2 | more than 30 days ago but within the past 12 months |
3 | more than 12 months ago but within the past 3 years |
4 | more than 3 years ago |