Palmoplantar Pustulosis and Generalized Pustular Psoriasis: A National Population-based Analysis of Prevalence

Palmoplantar Pustulosis and Generalized Pustular Psoriasis: A National Population-based Analysis of Prevalence

This study plans to calculate the prevalence and incidence of palmoplantar pustulosis and generalized pustular psoriasis based on the national medical insurance data and analyze the composition characteristics and some clinical features of patients, through taking into account of the research status of palmoplantar pustulosis and generalized pustular psoriasis and the characteristics of medical insurance data.

Inclusion Criteria:

• The insured population of the national urban employee basic medical insurance and the urban resident basic medical insurance from January 1, 2012, to December 31, 2016 (60 months) (the denominator)
• The patients have been diagnosed with palmoplantar pustulosis or generalized pustular psoriasis (including disease name, English abbreviation and ICD code)
• Both outpatient and inpatient patients are included

Exclusion Criteria:

• The individuals whose information is only contained in the reimbursement settlement database but not in the insurance coverage database will be considered as invalid reimbursement individuals and be excluded from the study (the denominator)
• The patients have been diagnosed with non-PPP and -GPP diseases, such as pustular psoriasis in palm and toe, pustular arthritis osteitis and SAPHO syndrome