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JOURNAL ARTICLE
RESEARCH SUPPORT, N.I.H., EXTRAMURAL
RESEARCH SUPPORT, NON-U.S. GOV'T
Demographic and Clinical Correlates of Mucosal Disaccharidase Deficiencies in Children With Functional Dyspepsia.
BACKGROUND: A subset of children with functional gastrointestinal disorders (FGIDs), which includes functional dyspepsia, may have duodenal disaccharidase deficiencies.
OBJECTIVES: To determine the frequency, demographics, and clinical characteristics associated with duodenal disaccharidase deficiencies in children with functional dyspepsia.
METHODS: Children ages 4 to 18 years undergoing esophagogastroduodenoscopy (EGD) evaluation for dyspepsia were enrolled in either a retrospective (study 1) or prospective (study 2) evaluation. Those with histologic abnormalities were excluded. Duodenal biopsies were obtained for disaccharidase enzyme analysis. In the retrospective study, both demographic and clinical characteristics were obtained via chart review. In the prospective study, parents completed the Rome II Questionnaire on Gastrointestinal Symptoms before the EGD.
RESULTS: One hundred and twenty-nine children (n = 101, study 1; n = 28, study 2) were included. Mean age was 11.2 ± 3.8 (SD) years in study 1 and 10.6 ± 3.2 years in study 2. Forty-eight (47.5%) of subjects in study 1 and 13 (46.4%) of subjects in study 2 had at least 1 disaccharidase deficiency identified. All of those with a disaccharidase deficiency in both studies had lactase deficiency with 8 (7.9%) and 5 (17.9%) of those in studies 1 and 2, respectively, having an additional disaccharidase deficiency. The second most common disaccharidase deficiency pattern was that of pan-disaccharidase deficiency (PDD) in both studies. In study 1 (where both race and ethnicity were captured), self-identified Hispanic (vs non-Hispanic, P < 0.05) and non-white (vs white, P < 0.01) children were more likely to have lactase deficiency. Age, sex, and type of gastrointestinal symptom were not associated with presence or absence of a disaccharidase deficiency.
CONCLUSIONS: Approximately half of children with functional dyspepsia undergoing EGD were identified as having a disaccharidase deficiency (predominantly lactase deficiency). Race/ethnicity may be associated with the likelihood of identifying a disaccharidase deficiency. Other clinical characteristics were not able to distinguish those with versus without a disaccharidase deficiency.
OBJECTIVES: To determine the frequency, demographics, and clinical characteristics associated with duodenal disaccharidase deficiencies in children with functional dyspepsia.
METHODS: Children ages 4 to 18 years undergoing esophagogastroduodenoscopy (EGD) evaluation for dyspepsia were enrolled in either a retrospective (study 1) or prospective (study 2) evaluation. Those with histologic abnormalities were excluded. Duodenal biopsies were obtained for disaccharidase enzyme analysis. In the retrospective study, both demographic and clinical characteristics were obtained via chart review. In the prospective study, parents completed the Rome II Questionnaire on Gastrointestinal Symptoms before the EGD.
RESULTS: One hundred and twenty-nine children (n = 101, study 1; n = 28, study 2) were included. Mean age was 11.2 ± 3.8 (SD) years in study 1 and 10.6 ± 3.2 years in study 2. Forty-eight (47.5%) of subjects in study 1 and 13 (46.4%) of subjects in study 2 had at least 1 disaccharidase deficiency identified. All of those with a disaccharidase deficiency in both studies had lactase deficiency with 8 (7.9%) and 5 (17.9%) of those in studies 1 and 2, respectively, having an additional disaccharidase deficiency. The second most common disaccharidase deficiency pattern was that of pan-disaccharidase deficiency (PDD) in both studies. In study 1 (where both race and ethnicity were captured), self-identified Hispanic (vs non-Hispanic, P < 0.05) and non-white (vs white, P < 0.01) children were more likely to have lactase deficiency. Age, sex, and type of gastrointestinal symptom were not associated with presence or absence of a disaccharidase deficiency.
CONCLUSIONS: Approximately half of children with functional dyspepsia undergoing EGD were identified as having a disaccharidase deficiency (predominantly lactase deficiency). Race/ethnicity may be associated with the likelihood of identifying a disaccharidase deficiency. Other clinical characteristics were not able to distinguish those with versus without a disaccharidase deficiency.
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