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Number of nights in hospital (edited)


For all hospital inpatient stays (EVENTYPE), NUMNIGHX reports the number of nights the individual stayed in the hospital.

IPUMS MEPS reports the universe for each variable based on a thorough review of the original MEPS documentation. Investigating the data may reveal cases that do not meet the stated universe. Users are encouraged to validate universes for their analyses.

NUMNIGHX is on the event record (see RECTYPE for more details on the different record types in IPUMS MEPS). Variables offered on the event record through IPUMS MEPS are derived from the dental visits, other medical expenses, hospital inpatient stays, emergency room visits, outpatient visits, office-based medical provider visits, and home health event files provided by AHRQ. Please see our overview of the event, medical conditions, and prescribed medicines variables, including how those variables are offered through IPUMS MEPS, and general considerations to keep in mind when conducting analyses using these variables.

NUMNIGHX is a 3-column wide variable with no implied decimals.


996: NIU
997: Unknown-refused
998: Unknown-not ascertained
999: Unknown-don't know


There are no comparability issues.


  • 1996-2021: All hospital inpatient stays (EVENTYPE).


  • 1996-2021



This variable has no flags.