Kawasaki disease is a serious illness that mostly affects young children. It causes swelling in blood vessels, including those in the heart. If these vessels get damaged, it can lead to aneurysms, which are weak spots that might burst. Doctors usually treat this with aspirin and IVIG. But some doctors wonder if adding prednisolone, a type of steroid, helps protect the heart better. This study looked at exactly that question to see if more aggressive treatment saves lives or prevents heart problems.
The researchers worked with 3,208 children across multiple centers in China. These kids had just been diagnosed with Kawasaki disease. They were split into two groups. One group got the standard treatment plus prednisolone. The other group got only the standard treatment. Everyone was watched closely for one month after they got sick to see how their hearts were doing.
The main worry was whether extra prednisolone would stop coronary-artery lesions from forming. These lesions are damage to the heart arteries. At one month, 16.0% of kids in the prednisolone group had these lesions. In the standard treatment group, 13.8% had them. That is a tiny difference of 1.1 percentage points. The study found this difference was not real or important. The extra medicine did not stop heart damage.
Some other results looked promising but need careful reading. Kids on prednisolone had a shorter fever, lasting 8.4 hours instead of 13.2 hours. Their inflammation markers also dropped faster. However, the number of medium-to-giant aneurysms was slightly higher in the prednisolone group. The overall safety was similar for both groups, but the lack of heart protection is the key finding.
This study has important limits. The math used to analyze the data was not adjusted for looking at so many different outcomes at once. This can make small differences look more important than they really are. Because of this, we cannot say for sure that prednisolone does not work, but the evidence here is not strong enough to change how we treat patients. Right now, the standard treatment remains the best choice.
For parents and patients, this means sticking to the current plan. The standard treatment works well for most children. Adding a steroid might make the fever go away faster, but it does not seem to protect the heart. Doctors should not start using prednisolone just because of this study. More research is needed to see if the benefits of shorter fevers are worth any potential risks.