The purpose of this study is to collect real-world data in order to estimate the frequency of overall malignancies, melanoma, basal cell carcinoma, and squamous cell carcinoma in participants with rheumatoid arthritis (RA) or psoriatic arthritis (PsA) enrolled in the SRQ Register in Sweden.
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Incidence Rate of Overall Malignancies
Timeframe: 5 years
Incidence Rate of Melanoma
Timeframe: 5 years
Incidence Rate of Non-melanoma Skin Cancer
Timeframe: 5 years
Incidence Rate of Basal Cell Carcinoma
Timeframe: 5 years
Incidence Rate of Squamous Cell Carcinoma
Timeframe: 5 years