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Number of injury episodes, past 3 months

Codes and Frequencies

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For persons who had at least one injury or poisoning episode in the past 3 months, INJURY3MONO reports the number of injury or poisoning episodes a person had in the past 3 months.

INJURY3MONO is a person-level variable and is derived from corresponding injury/poisoning episode-level data.

INJURY3MONO is part of a series of variables initiated in 1997 that systematically report persons' injuries and poisonings, the cause, what the person was doing while sustaining the injury or poisoning, and where she/he was at the time of the injury or poisoning. For related variables and additional information, please see the User note on Injuries and Poisonings or use the IPUMS NHIS search function and drop-down menus.


Prior to 2000, persons were asked about injuries and poisonings separately; in 2000, these categories were combined and persons were asked about the causes, activities, and locations related to injury and poisoning episodes at the same time. To make INJURY3MONO comparable for 1997-1999 and 2000-forward, users should sum the observations for INJURY3MONO with those for POISON3MONO. It should be noted that beginning in 2000, persons could list up to ten episodes of injuries or poisonings; prior to 2000 persons could list up to four injuries and four poisonings, respectively.

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for this variable in particular...fic to the variables before this, but then follow up with a general overviewIn 2000 a screening question regarding the number of injuries or poisonings that were serious enough to seek medical attention was reworded and caused a marked decrease in the number of persons reporting injuries. The question was changed back to the originally intended wording in subsequent years.

Between 1997 and 1999, in some instances, the respondent could only report a maximum of four injury and four poisoning episodes per person. Since the NHIS only collects detailed information on the four most recent injury or poisoning episodes, we do not have any information on these additional injury or poisoning episodes. Starting in 2000, a person may list up to ten injury and/or poisoning episodes, and will appear in this file as many times as he/she has unique injury and/or poisoning episodes. For greater detail on these changes, please see the User Note on Injuries and Poisonings .


  • 1997-2017: Persons who had at least 1 injury or poisoning episode during past 3 months.


  • 1997-2017