Data Cart

Your data extract

0 variables
0 samples
View Cart
Duration of functionally limiting 2nd unclassified cause: Number of units

Codes and Frequencies

Can't find the category you are looking for? Try the Detailed codes


For Sample Adults age 18+ who, without using special equipment, had any difficulty with one or more functional activities (FLANY), and who identified a second problem, not listed on the interviewer-provided flashcard and not one of the other categories available to interviewers for purposes of classifying conditions as a cause of any functional activity limitation (FLNEC2), FLNEC2NO reports the number of time units the respondent stated when reporting the duration of the "not elsewhere classified condition".

Data on the duration of the limiting "not elsewhere classified condition" were collected via the question, "How long have you had [condition]?" Respondents could answer this open-ended question using the time unit of their choice (i.e., days, weeks, months, years, or since birth). The original responses to the question are reported in two complementary variables, FLNEC2TP (which specifies the time unit) and FLNEC2NO (which reports the number of such units). As noted in the Codebooks for 1997 forward, "years are topcoded at 85." For the NHIS public use files, the National Center for Health Statistics (NCHS) recoded the results from these two variables to create two other variables using standard time units: years (FLNEC2Y) and groups of months (FLNEC2MO).

The 1997 forward NHIS Survey Descriptions caution that because the ad hoc classified condition categories (such as a "not elsewhere classified condition" (FLNEC2)) were not included on flashcards given to respondents during the course of the interview, it is possible that weighted frequencies for these conditions may be underestimated. Thus, the NCHS recommends that "these variables should be analyzed with care."


The variable is completely comparable over time.


  • 1997-1998; 2000-2016 2017 2018: Sample adults age 18+ who have difficulty with activities due to second unclassified problem.


  • 1997-1998, 2000-2018