TY - JOUR
T1 - Case definition in epidemiologic studies of AD/HD
AU - Katusic, Slavica K.
AU - Barbaresi, William J.
AU - Colligan, Robert C.
AU - Weaver, Amy L.
AU - Leibson, Cynthia L.
AU - Jacobsen, Steven J.
N1 - Funding Information:
This project was supported by research grant HD29745 and AR30582 from the Public Health Service of the National Institutes of Health (Bethesda, MD) and Mayo Foundation (Rochester, MN).
PY - 2005/6
Y1 - 2005/6
N2 - PURPOSE: Propose a five-step multigating, multimodal procedure for research case definition and identification of attention-deficit/hyperactivity disorder (AD/HD) in population-based epidemiologic studies. METHODS: Subjects included a birth cohort of all children born between 1976 and 1982 who remained in Rochester after age 5. Screening for AD/HD required 4 steps, using these sources: school/medical records, computerized diagnostic index, and private psychiatry records. In step 5, research criteria were applied to potential cases. The model for defining cases used combinations of three categories of information (DSM-IV, questionnaire, clinical diagnosis). Validity was tested by comparing medication treatment, substance abuse, school outcomes, and comorbidities between cases who did or did not meet DSM-IV criteria. RESULTS: Among 5718 subjects, 1344 potential cases were identified; 379 met research criteria. No difference in gender, treatment, school outcome, or professional making clinical diagnoses was found between cases who did (N = 228) and did not (N = 151) meet DSM-IV criteria. However, cases not meeting DSM-IV criteria were more inattentive (33.8% vs. 17.1%; p < 0.001), older (age 12.8 vs. 10.5 years; p = 0.01), with less substance abuse (15.2% vs. 26.3%; p < 0.001) and psychiatric comorbidities (43.1% vs. 54.4%; p = 0.031). CONCLUSIONS: If only DSM-IV criteria were applied, 151 cases would not have been identified. This study underscores the importance of using multiple sources and combinations of documented information for case definition and identification.
AB - PURPOSE: Propose a five-step multigating, multimodal procedure for research case definition and identification of attention-deficit/hyperactivity disorder (AD/HD) in population-based epidemiologic studies. METHODS: Subjects included a birth cohort of all children born between 1976 and 1982 who remained in Rochester after age 5. Screening for AD/HD required 4 steps, using these sources: school/medical records, computerized diagnostic index, and private psychiatry records. In step 5, research criteria were applied to potential cases. The model for defining cases used combinations of three categories of information (DSM-IV, questionnaire, clinical diagnosis). Validity was tested by comparing medication treatment, substance abuse, school outcomes, and comorbidities between cases who did or did not meet DSM-IV criteria. RESULTS: Among 5718 subjects, 1344 potential cases were identified; 379 met research criteria. No difference in gender, treatment, school outcome, or professional making clinical diagnoses was found between cases who did (N = 228) and did not (N = 151) meet DSM-IV criteria. However, cases not meeting DSM-IV criteria were more inattentive (33.8% vs. 17.1%; p < 0.001), older (age 12.8 vs. 10.5 years; p = 0.01), with less substance abuse (15.2% vs. 26.3%; p < 0.001) and psychiatric comorbidities (43.1% vs. 54.4%; p = 0.031). CONCLUSIONS: If only DSM-IV criteria were applied, 151 cases would not have been identified. This study underscores the importance of using multiple sources and combinations of documented information for case definition and identification.
KW - AD/HD
KW - Attention-Deficit/Hyperactivity Disorder
KW - Birth Cohort
KW - Epidemiology
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U2 - 10.1016/j.annepidem.2004.12.004
DO - 10.1016/j.annepidem.2004.12.004
M3 - Article
C2 - 15967390
AN - SCOPUS:20644470921
SN - 1047-2797
VL - 15
SP - 430
EP - 437
JO - Annals of Epidemiology
JF - Annals of Epidemiology
IS - 6
ER -