This study is designed to analyze the frequency and incidence rate of pulmonary complications in JIA participants who received biological DMARDs and non-biologic DMARDs. The participants having evidence of of a prescription or administration of one of the biologic or non-biologic DMARDs will be included in five different treatment groups. Data from the Thomson Reuters MarketScan® Commercial Claims and Medicare Supplemental Databases will be used to estimate the incidence rate of pulmonary complications.