Efficacy and safety of 10 mg versus 30 mg of oral prednisolone for acute CPP crystal arthritis: findings of a randomized controlled trial

The optimal prednisolone dose for managing acute calcium pyrophosphate (CPP) crystal arthritis remains unclear. We compared the efficacy and safety of 10- and 30-mg daily doses of prednisolone for acute CPP crystal arthritis.

This randomized, controlled, open-label trial included patients with acute CPP crystal arthritis and symptoms that had begun less than 72 h earlier. Patients without CPP crystals, those with septic arthritis, and those with uncontrolled infections were excluded. Participants received either 10 or 30 mg of prednisolone daily for 7 days. The primary outcome was time until complete resolution of symptoms; secondary outcomes included time until clinical resolution, recurrence rates, laboratory profiles, and adverse events, adjusted for confounders.

Seventy-nine patients participated. Baseline characteristics were comparable, except that the 30-mg recipients had more initial inpatient visits (p = 0.03). The median time until complete resolution was 7 days in both groups (p = 0.73). The 30-mg recipients exhibited faster clinical resolution (1 vs. 3 days; p = 0.03), but adjusted analyses revealed no significant differences in time until complete resolution (6.2 vs. 6.5 days; p = 0.68) or clinical resolution (2.4 vs. 2 days; p = 0.27). The overall recurrence rate was 14.3%; the 30-mg recipients experienced slightly more recurrences (p = 0.08). The other secondary outcomes did not differ significantly.

The 10- and 30-mg daily doses of prednisolone were equally effective in treating acute symptoms of CPP crystal arthritis, with no significant differences in resolution time, recurrence rates, or safety outcomes.