YMDELT: YOUTH: LIFETIME MAJOR DEPRESSIVE EPISODE (MDE)
NOTE: The variables in this section are recoded variables that were created from one or more of the edited variables from the preceding section. NOTE: Since 2005, all adult respondents aged 18 or older and adolescent (youth) respondents aged 12 to 17 have been administered separate age-appropriate depression modules designed to measure whether or not respondents had experienced a major depressive episode (MDE) in their lifetime and past year. Relevant data from both adults and adolescents were used to create recoded past year and lifetime MDE variables. Even though these MDE recodes used the relevant sections of the questionnaire for adults and adolescents, single variables were created for the entire population prior to 2008. For example, the lifetime MDE variable in the datasets prior to 2008 contained both the adolescent lifetime MDE recode created using data from the adolescent section and the adult lifetime MDE recode created using data from the adult section. In 2008, instead of a single set of variables containing the recoded MDE data for both adult and youth respondents, two recoded sets of MDE variables were created for adolescents and adults separately. This change was due to context effects stemming from changes in the mental health module which precedes the adult depression section within the questionnaire. Based on an analysis to determine the potential presence of context effects, it was determined that the adult depression data are not considered comparable to prior years and therefore all adult depression recode variables starting in 2008 had to be renamed to indicate the lack of comparability with prior years. See the 2008 Recoded Mental Health Module Variable Documentation Appendix for more information. In 2009, changes were made to the youth mental health service utilization (YMHSU) questions that preceded the adolescent depression questions. These changes included the replacement of five questions that asked about receipt of special education services and school counseling, and time spent in jail or foster care with questions that asked about receipt of mental health services in the education and justice system sectors. Due to this change, a context effect analysis was done using data from the first 6 months of the 2009 NSDUH and sought to determine whether changes in the YMHSU module affected responses to the first three adolescent depression questions and the lifetime and past year MDE estimates. The results of the analysis showed these changes in 2009 did not appear to affect the estimates of adolescent MDE. The youth depression data and associated MDE estimates were not impacted by either of the 2008 adult changes or the 2009 YMHSU module changes and are considered comparable to prior years. However, despite remaining comparable to prior years, the variables that shared the same variable names for both youth and adult depression data were assigned new names in 2008 since the adult data were no longer comparable with prior data. These renamed youth variables can be used in comparisons or analyses with data prior to 2008 by renaming the recoded adolescent depression variables the same across all the years. Youth depression variables that did not require renaming are noted specifically in the comments above the variables below. Specific details about these recoded variables and further information about context effects on the MDE estimates are provided in the Recoded Depression Variable Documentation Appendix. The following variable, YMDELT, classifies an adolescent as having a major depressive episode (MDE) in their lifetime (YMDELT=1) if they reported experiencing at least 5 out of the 9 criteria used to define an adolescent as having had MDE in their lifetime, where at least one of the criteria is a depressed mood or loss of interest or pleasure in daily activities (YODSMMDE=1). An adolescent was classified as NOT having a major depressive episode (MDE) in their lifetime (YMDELT=2) if they met either of these conditions: (1) Reported experiencing fewer than 5 out of the 9 criteria used to define an adolescent as having had MDE in their lifetime (YODSMMDE=2). (2) If the number of criteria used to define an adolescent as having had MDE in their lifetime is unknown (YODSMMDE=98) and the respondent reported at least one of the following: (I) Never having had a period of time lasting several days or longer when felt sad, empty, or depressed (YODPREV=2), discouraged or hopeless about how things were going in life (YODSCEV=2), or lost interest and became bored with most things usually enjoyable (YOLOSEV=2). (II) Experienced the feelings in (I), but they did not last most of the day, almost every day for two weeks or longer [YOLSI2WK=2 or YODPR2WK=2]. (III) Experienced the feelings in (I) most of the day, almost every day for two weeks or longer, but the feelings lasted less than an hour when mood was most severe and frequent (YOWRHRS=1). (IV) Experienced the feelings in (I) most of the day, almost every day for two weeks or longer for at least an hour during those times when mood was most severe and frequent, but the bad feelings were mild (YOWRDST=1), there was never a time when you felt so bad that nothing could cheer you up (YOWRCHR=4), and there was never a time when you felt so bad that you could not carry out your daily activities (YOWRIMP=4). (V) Experienced the feelings in (I) most of the day, almost every day for two weeks or longer for at least an hour with bad feelings that were more than mild or at some point could not be cheered up or could not carry out daily activities, but never had any other problems during those weeks, such as changes in sleep, eating, energy, the ability to keep mind on things, or feeling badly about self (YODPPROB=2).
|2||No (See comment above)||14,853||26.9%|
|-9||Aged 18+/Unknown (Otherwise)||38,022||68.8%|
Based upon 17,212 valid cases out of 55,234 total cases.
- mean: 1.86
- median: 2.00
- mode: 2.00
- minimum: 1
- maximum: 2
- standard deviation: 0.34
Location: 6275-6276 (width: 2; decimal: 0)
Variable Type: numeric
(Range of) Missing Values: -9
Source: This variable was taken from: National Survey on Drug Use and Health, 2009.
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Disclaimer: The frequencies for this variable may not be weighted. They are purely descriptive and may not be representative of the study population. Please use with caution and consult the study documentation.