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Duration since smoked cigarettes regularly: Number of units


SMOKREGNO is a 2-digit numeric variable with no implied decimals.

00: Not in Universe
98: Time length is top coded at 98
99: Not in Universe


For sample persons aged 18 and older who used to smoke regularly but do not smoke now, SMOKREGNO indicates the number of units corresponding to the length of time since the respondent last smoked cigarettes regularly.

Related Variables
SMOKREGNO reports a number 1 through 98 that can be used with SMOKREGTP, the time period in days, weeks months or years that the respondent reported.

This variable was included in the 1988 Occupational Health supplement.


There are no comparability issues.


  • 1988: Sample adults aged 18+ who used to smoke regularly but do not smoke now


  • 1988