Coronary disease & ACSRandomised controlled trial

Randomized Trial of Adjunctive Prednisolone for Kawasaki Disease

N Engl J MedPublished

  • Randomised controlled trial
  • multicentre
  • open-label

Authors' conclusion

The addition of prednisolone to standard primary treatment for Kawasaki disease did not reduce the incidence of coronary-artery lesions at 1 month after illness onset.

Study context

Population
Participants with newly diagnosed Kawasaki disease, China
Participants
3,208 participants
Comparison
Prednisolone plus standard treatment vs standard treatment alone
Primary endpoint
Coronary-artery lesions
Follow-up
1 month after illness onset

Primary result

As reported in the abstract

Adjusted risk difference

1.1 percentage points

95% CI −1.0 to 3.4

P = 0.31

By group

Prednisolone plus standard treatment vs Standard treatment alone
adjusted risk difference 1.1 percentage points (95% CI −1.0 to 3.4); P = 0.31

Secondary outcomes

Rescue therapy · not controlled for multiplicity

Coronary-artery lesions · 3 months

Progression of coronary-artery lesions · 3 months

Medium-to-giant coronary-artery aneurysms · 3 months

Duration of fever · not controlled for multiplicity

Reduction in CRP level · 72 hours · not controlled for multiplicity

Coronary-artery z scores

Decreases in coronary-artery z scores were similar in the two groups

Safety

Overall adverse events

Overall incidence of adverse events did not differ significantly between the two groups

Original publication

Randomized Trial of Adjunctive Prednisolone for Kawasaki Disease. N Engl J Med. Published 16 April 2026. doi:10.1056/nejmoa2511478

Summarised from the published abstract; every number is checked against it