`DUQ310U` // How long has it been since you last used heroin?

→ use this variable in analysis ← back to dataset

attributes

dataset	nhanes2018 · NHANES 2017-2018 Cycle
type	`categorical`
role
data file	`DUQ_J`
keywords

Coded values

code	meaning
`1`	Days
`2`	Weeks
`3`	Months
`4`	Years