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Mortality Among Persons With a History of Kawasaki Disease in Japan
The Fifth Look
Yosikazu Nakamura, MD, MPH, FFPHM;
Hiroshi Yanagawa, MD, FFPHM;
Kensuke Harada, MD;
Hirohisa Kato, MD;
Tomisaku Kawasaki, MD
Arch Pediatr Adolesc Med. 2002;156:162-165.
Objective To determine whether patients with Kawasaki disease have a higher death
rate than an age-matched healthy population after disease occurrence.
Study Design From July 1, 1982, to December 31, 1992, 52 collaborating hospitals
collected data on all patients with a new definite diagnosis of Kawasaki disease.
Patients were followed up until December 31, 1999, or death. The expected
number of deaths was calculated from Japanese vital statistics data and compared
with the observed number.
Results Of 6576 patients enrolled, 27 (19 male, 8 female) died. The standardized
mortality ratio (the observed number of deaths divided by the expected number
of deaths based on the vital statistics in Japan) was 1.25 (95% confidence
interval, 0.84-1.85). Despite the high standardized mortality ratios during
the acute disease phase, the mortality rate was not high after the acute phase
for the entire group of patients. Although the standardized mortality ratio
after the acute phase was 0.76 for those without cardiac sequelae, 6 male
patients (no female patients) with cardiac sequelae died during this period,
and the standardized mortality ratio for the male group with cardiac sequelae
was 2.35 (95% confidence interval, 0.96-5.19).
Conclusions Although it was not statistically significant, the mortality rate among
male patients with cardiac sequelae due to Kawasaki disease seemed higher
than that in the general population. On the other hand, mortality rates for
female patients with sequelae and both male and female patients without sequelae
were not elevated.
From the Department of Public Health, Jichi Medical School, Minamikawachi
(Dr Nakamura); Saitama Prefectural University, Koshigaya (Dr Yanagawa); Department
of Pediatrics, Nihon University School of Medicine, Tokyo (Dr Harada); Department
of Pediatrics and Child Health, Kurume University School of Medicine, Kurume
(Dr Kato); and Kawasaki Disease Research Center, Tokyo (Dr Kawasaki), Japan.
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