Validity of diagnostic codes and prevalence of psoriasis and psoriatic arthritis in a managed care population, 1996-2009
Authors
Asgari, Maryam M.Wu, Jashin J.
Gelfand, Joel M.
Salman, Craig
Curtis, Jeffrey R.
Harrold, Leslie R.
Herrinton, Lisa J.
UMass Chan Affiliations
Department of Orthopedics and Physical RehabilitationDepartment of Medicine, Division of Rheumatology
Meyers Primary Care Institute
Document Type
Journal ArticlePublication Date
2013-08-01Keywords
PsoriasisArthritis, Psoriatic
Prevalence
Computerized medical information
Epidemiology
Incidence
Prevalence
Health maintenance organizations
Pharmacoepidemiology
Psoriasis
Psoriatic arthritis
Clinical Epidemiology
Dermatology
Health Services Research
Pharmacy and Pharmaceutical Sciences
Rheumatology
Skin and Connective Tissue Diseases
Metadata
Show full item recordAbstract
BACKGROUND: Few population-based studies have reported the prevalence of psoriatic disease. OBJECTIVE: We validated computerized diagnoses to estimate the prevalence of psoriasis and psoriatic arthritis. METHOD: We identified adults with >/=1 ICD-9 diagnosis codes of 696.0 (psoriatic arthritis) or 696.1 (psoriasis) in clinical encounter data during 1996-2009 and used chart review to confirm the diagnoses in random samples of patients. We then used the best performing case-finding algorithms to estimate the point prevalence of psoriasis and psoriatic arthritis. RESULTS: The number of persons with a diagnosis for psoriasis (ICD-9 code 696.1) was 87 827. Chart review of a random sample of 101 cases with at least one dermatologist-rendered psoriasis code revealed a positive predictive value (PPV) of 90% (95% CI, 83-95) with sensitivity of 88% (95% CI, 80-93). Psoriatic arthritis (code 696.0) was recorded for 5187 patients, with the best performing algorithm requiring >/=2 diagnoses recorded by a rheumatologist or >/=1 diagnosis recorded by a rheumatologist together with >/=1 psoriasis diagnoses recorded by a dermatologist; the PPV was 80% (95% CI, 70-88) with sensitivity 73% (95% CI, 63-82). Among KPNC adults, the point prevalence of psoriasis, with or without psoriatic arthritis, was 939 (95% CI, 765-1142) per 100 000, and the overall prevalence of psoriatic arthritis, with or without psoriasis, was 68 (95% CI, 54-84) per 100 000. CONCLUSION: Within an integrated health care delivery system, the use of computerized diagnoses rendered by relevant disease specialists is a valid method for identifying individuals with psoriatic disease. Copyright (c) 2013 John Wiley and Sons, Ltd.Source
Asgari MM, Wu JJ, Gelfand JM, Salman C, Curtis JR, Harrold LR, Herrinton LJ. Validity of diagnostic codes and prevalence of psoriasis and psoriatic arthritis in a managed care population, 1996-2009. Pharmacoepidemiol Drug Saf. 2013 Aug;22(8):842-9. doi: 10.1002/pds.3447. Link to article on publisher's site
DOI
10.1002/pds.3447Permanent Link to this Item
http://hdl.handle.net/20.500.14038/37231PubMed ID
23637091Related Resources
Link to Article in PubMedae974a485f413a2113503eed53cd6c53
10.1002/pds.3447