Abstract
Objective
Prior studies on the epidemiology of Whipple’s disease are limited by small sample size and case series design. We sought to characterize the epidemiology of Whipple’s disease in the USA utilizing a large population-based database.
Methods
We queried a commercial database (Explorys Inc, Cleveland, OH), an aggregate of electronic health record data from 26 major integrated healthcare systems in the USA. We identified a cohort of patients with a diagnosis of Whipple’s disease based on systemized nomenclature of medical terminology (SNOMED CT) codes. We calculated the overall and age-, race-, ethnicity, and gender-based prevalence of Whipple’s disease and prevalence of associated diagnoses using univariate analysis.
Results
A total of 35,838,070 individuals were active in the database between November 2012 and November 2017. Of these, 350 individuals had a SNOMED CT diagnosis of Whipple’s disease, with an overall prevalence of 9.8 cases per 1 million. There was no difference in prevalence based on sex. However, prevalence of Whipple’s disease was higher in Caucasians, non-Hispanics, and individuals > 65 years old. Individuals with a diagnosis of Whipple’s disease were more likely to have associated diagnoses/findings of arthritis, CNS disease, endocarditis, diabetes, malignancy, dementia, vitamin D deficiency, iron deficiency, chemotherapy, weight loss, abdominal pain, and lymphadenopathy.
Conclusions
To our knowledge, this is the largest study to date examining the epidemiology of Whipple’s disease. In this large population-based study, the overall prevalence of Whipple’s disease in the USA is 9.8 cases per 1 million people. It affects men and women at similar rates and is more common in Caucasians, non-Hispanics, and people > 65 years old.
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Abbreviations
- SNOMED CT:
-
Systematized nomenclature of medicine clinical terms
- CNS:
-
Central nervous system
- HIV:
-
Human immunodeficiency virus
- HLA:
-
Human leukocyte antigen
- OR:
-
Odds ratio
- CI:
-
Confidence interval
- ICD-9:
-
International classification of diseases-9
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Contributions
JAE and EM contributed to study conception and design; JAE and EM are involved in acquisition of data; JAE, EM, MA, and GSC analyzed and interpreted the data; JAE, EM, and GSC drafted the manuscript; EM and GSC critically revised the manuscript; JAE and EM were involved in statistical analysis; GSC obtained the funding; and GSC supervised the study.
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Jamie Ann Elchert, Emad Mansoor, Mohannad Abou-Saleh, and Gregory S. Cooper declare that they have no conflict of interests.
Appendix
Appendix
Abdominal pain included SNOMED CT codes for abdominal pain, generalized abdominal pain, chronic abdominal pain, acute abdominal pain. Malignancy included SNOMED CT codes for malignant neoplastic disease, neoplastic disease, primary malignant neoplasm. Seizure included SNOMED CT codes for seizure, seizure disorder, generalized seizure, partial seizure, epileptic seizure, and seizure-related finding. Iron deficiency included SNOMED CT codes for iron deficiency and iron deficiency anemia. Ataxia included SNOMED CT codes for ataxia and cerebellar ataxia. Skin hyperpigmentation included SNOMED CT codes for disorder of skin pigmentation. Hypoalbuminemia included SNOMED CT codes for hypoalbuminemia. Diabetes included SNOMED CT codes for diabetes mellitus, diabetes mellitus without complication, type 2 diabetes mellitus, type 1 diabetes mellitus. Vitamin B 12 deficiency included SNOMED CT codes for vitamin B12 deficiency (non-anemic) and cobalamin deficiency. Vitamin D deficiency included SNOMED CT codes for vitamin D deficiency. Myocarditis included SNOMED CT codes for myocarditis, acute myocarditis, viral myocarditis, bacterial myocarditis. Pericarditis included SNOMED CT codes for pericarditis. Dementia included SNOMED CT codes for dementia, presenile dementia, senile dementia, uncomplicated senile dementia, uncomplicated presenile dementia, senile dementia with delirium, and presenile dementia with delirium. Lymphadenopathy included SNOMED CT codes for lymphadenopathy, cervical lymphadenopathy, thoracic lymphadenopathy, pelvic lymphadenopathy, mediastinal lymphadenopathy, hilar lymphadenopathy, lymphadenopathy of head and/or neck. Chemotherapy included SNOMED CT codes for chemotherapy, antineoplastic agent, intravenous chemotherapy, intramuscular chemotherapy, subcutaneous chemotherapy. Weight loss included SNOMED CT codes for abnormal weight loss, weight loss finding, weight decreased. HIV included SNOMED CT codes for human immunodeficiency virus infection and HIV positive. Arthritis included SNOMED CT codes for arthritis, arthralagia of upper arm, arthropathy, arthralgia of the lower leg, arthralgia of the pelvic region and thigh, arthralgia of the ankle and/or foot. CNS disease included SNOMED CT codes for disorder of the nervous system. Immunosuppression included SNOMED CT codes for immunosuppressant, immunosuppressives, immunomodulator, immunotherapeutic agent. Diarrhea included SNOMED CT codes for diarrheal disorder, diarrhea, chronic diarrhea, diarrhea and vomiting, acute diarrhea, infectious diarrheal disease, functional diarrhea, nausea/vomiting/and diarrhea, irritable bowel syndrome with diarrhea. Endocarditis included SNOMED CT codes for endocarditis or endocardial disease. HLA-B27 included SNOMED CT codes for HLA-B27.
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Elchert, J.A., Mansoor, E., Abou-Saleh, M. et al. Epidemiology of Whipple’s Disease in the USA Between 2012 and 2017: A Population-Based National Study. Dig Dis Sci 64, 1305–1311 (2019). https://doi.org/10.1007/s10620-018-5393-9
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DOI: https://doi.org/10.1007/s10620-018-5393-9