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Survey Items:
Denominator: Children age 0-17 years
Numerator: Of 16 health conditions asked about: currently have none of these health conditions; currently have mild health conditions only; currently have at least one moderate or severe health condition
Revisions and Changes: Although root questions K2Q30-K2Q46 were not changed in 2007, parent-rated severity of current health conditions is new. In both surveys 16 conditions were named and parents were asked to respond for each condition whether they have ever been told by a health professional that their child has that condition. The 2007 survey added two follow-up questions that were not asked in 2003. In the 2007 NSCH parents who responded “yes” to the first question were asked if the child currently has that condition. Parents of children who currently have each condition were asked if they would describe it as mild, moderate or severe.
Additional Notes: Parents were asked to respond to a series of three questions about each of 16 acute or chronic health conditions: learning disability (K2Q30A-C), ADD or ADHD (K2Q31A-C), depression (K2Q32A-C), anxiety problems (K2Q33A-C), behavioral or conduct problems (K2Q34A-C), autism or other autism spectrum disorder (K2Q35A-C), developmental delay (K2Q36A-C), speech problems (K2Q37A-C), asthma (K2Q40A-C), diabetes (K2Q41A-C), Tourette Syndrome (K2Q38A-C), epilepsy or seizure disorder (K2Q42A-C), hearing problems (K2Q43A-C), vision problems (K2Q44A-C), bone or joint problems (K2Q45A-C), and brain injury or concussion (K2Q46A-C). For each condition, respondents were asked whether they have ever been told by a health care professional that the child has the condition and whether the child currently has the condition. For children who currently have each specified condition, parents were asked to rate it as mild, moderate, or severe. Indicator 1.9 groups children according the most serious condition(s) they currently have. Please note that in the NSCH all information about children's health conditions is based on parent recollection and is not independently verified. Further, a response of "Yes" to having "ever been told" that a child has a specific health condition (e.g., K2Q31A = Yes) DOES NOT indicate whether the child currently has that particular condition and therefore should not be interpreted as current prevalence.
Treatment of Unknown Values: Unknown values (responses coded as 'refused', 'don't know', or system missing) are not included in the denominator when calculating prevalence estimates and weighted population counts displayed in the data query results table. In nearly every case, the proportion of unknown values is less than 1% and the exclusion of these values does not change the prevalence estimates (%) and only marginally affects the weighted population counts (Weighted Est.). Exceptions are noted in the form of a “Data Alert” at the bottom of a results table.
History and Development: The Maternal and Child Health Bureau leads the development of the NSCH survey and indicators, in collaboration with the National Center for Health Statistics (NCHS) and a national technical expert panel. The expert panel includes representatives from other federal agencies, state Title V leaders, family organizations, and child health researchers. Previously validated questions and scales are used when available. Respondents’ cognitive understanding of the survey questions is assessed during the pretest phase and revisions made as required. All final data components are verified by NCHS and DRC/CAHMI staff prior to public release.
C.I. = 95% Confidence Interval. Percentages and population estimates (Pop.Est.) are weighted to represent child population in US.
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With funding and direction from the Maternal and Child Health Bureau, the National Survey of Children’s Health was conducted by the Centers for Disease Control and Prevention’s National Center for Health Statistics. CAHMI is responsible for the analyses, interpretations, presentations and conclusions included on this site.
Suggested citation format: National Survey of Children's Health. NSCH 2007. Data query from the Child and Adolescent Health Measurement Initiative, Data Resource Center for Child and Adolescent Health website. Retrieved [mm/dd/yy] from www.childhealthdata.org.