Skip Navigation LinksHome > June 2012 - Volume 30 - Issue 6 > Risk factors for sudden cardiac death among Japanese: the C...
Journal of Hypertension:
doi: 10.1097/HJH.0b013e328352ac16
ORIGINAL PAPERS: Epidemiology

Risk factors for sudden cardiac death among Japanese: the Circulatory Risk in Communities Study

Ohira, Tetsuyaa,b; Maruyama, Minakoa,b; Imano, Hironoria,b; Kitamura, Akihikob; Kiyama, Masahikob; Okada, Takeob; Maeda, Kenjib; Yamagishi, Kazumasab,c; Noda, Hiroyukia,b; Cui, Renzhea,b; Masuda, Sachikod; Kimura, Hiromichid; Tachikawa, Kojie; Ishikawa, Yoshinorib; Iso, Hiroyasua

Collapse Box

Abstract

Objective: There is little evidence concerning risk factors for sudden cardiac death (SCD) among Asians.

Patients and methods: A prospective, nested, case–control study of Japanese patients aged between 30 and 84 years was undertaken using data collected from 26 870 participants in cardiovascular risk surveys conducted in four communities between 1975 and 2005. The incidence of SCD was ascertained by systematic surveillance, with 239 cases of SCD identified over this period. For each case of SCD, three control patients were selected, matched by age, sex, examination year, follow-up time, and community.

Results: Hypertension, diabetes mellitus, smoking, major ST-T abnormalities, left high amplitude R waves, and increased heart rate (≥77 beat/min) were all independently associated with a 1.5–3.2-fold increase in SCD risk, whereas no associations were observed for body mass index and hypercholesterolemia. The population-attributable fraction [95% confidence interval (CI)] was 23.0% (2.9–39.0) for hypertension, 15.3% (3.8–25.5) for current smoking, 14.5% (8.0–20.5) for major ST-T abnormalities, and 8.1% (2.2–13.7) for diabetes mellitus. The number of SCD risk factors (hypertension, diabetes, smoking, and ECG abnormalities) was positively associated with increased SCD risk. The odds ratio for increased SCD risk with three or more risk factors versus zero risk factors was 5.76 (95% CI 3.20–10.39).

Conclusions: Among the Japanese population, hypertension, smoking, major ST-T abnormalities, left high amplitude R waves, and diabetes mellitus were associated with an increased incidence of SCD, whereas there were no associations of body mass index or hypercholesterolemia with SCD incidence.

© 2012 Lippincott Williams & Wilkins, Inc.

Login

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.