• Pattern of risks of rheumatoid arthritis among patients using statins: A cohort study with the clinical practice research datalink.

      de Jong, Hilda J I; Cohen Tervaert, Jan Willem; Lalmohamed, Arief; de Vries, Frank; Vandebriel, Rob J; van Loveren, Henk; Klungel, Olaf H; van Staa, Tjeerd P (2018)
      We examined the association between statin use and the risk of rheumatoid arthritis (RA), with special focus on describing the patterns of risks of RA during statin exposure in a large population-based cohort in the United Kingdom. In the Clinical Practice Research Datalink, patients aged ≥40 years with at least one prescription of statins (1995-2009) were selected, and matched by age (+/-5 years), sex, practice and date of first prescription of statins to non-users. The follow-up period of statin use was divided into periods of current, recent and past exposure, with patients moving between these three exposure categories over time. Time-dependent Cox models were used to derive hazard ratios (HRs) of RA, adjusted for disease history and previous drug use. The study population included 1,023,240 patients, of whom 511,620 were statin users. No associations were found between RA and current (HRadj,1.06;99%CI:0.88-1.27) or past statin users (HRadj,1.18;99%CI:0.88-1.57). However, in patients who currently used statins, hazard rates were increased shortly after the first prescription of statins and then gradually decreased to baseline level. The risk of developing RA was increased in recent statin users, as compared to non-users (HRadj,1.39;99%CI:1.01-1.90). The risk of RA is substantially increased in the first year after the start of statins and then diminishes to baseline level. These findings may suggest that statins might accelerate disease onset in patients susceptible to develop RA, but in other patients, statins are probably safe and well tolerated, even after prolonged use. Alternatively, we cannot rule out that confounding by cardiovascular risk factors and ascertainment bias may have influenced the findings.
    • Pattern of risks of systemic lupus erythematosus among statin users: a population-based cohort study.

      De Jong, Hilda J I; van Staa, Tjeerd P; Lalmohamed, Arief; de Vries, Frank; Vandebriel, Rob J; Van Loveren, Henk; Klungel, Olaf H; Cohen Tervaert, Jan Willem (2017-10)
      To examine the association between the use of statins and the risk of systemic lupus erythematosus (SLE) with focus on describing the patterns of risks over time.
    • Response to: 'Statins in systemic lupus erythematosus' by Abud-Mendoza.

      de Jong, Hilda J I; van Staa, Tjeerd P; Cohen Tervaert, Jan Willem (2018-01-22)