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    Associations of serum high density lipoprotein and total cholesterol with total, cardiovascular, and cancer mortality in a 7-year prospective study of 10 000 men

Yaari S, Goldbourt , Even-Zohar S, Neufeld HN.

10 059 civil servants and municipal employees, aged 40--65, were examined in the Israeli Ischaemic Heart Disease Study. 475 (4.72%) died during a 7-year follow-up. High density lipoprotein (HDL) cholesterol levels were determined in the last 6562 men entering the study. 305 (4.65%) of these men died. Coronary heart disease (CHD) accounted for 37% of the total deaths. A "J" shaped relation which persisted after removing data on early mortality (first 2 years) was observed between total cholesterol and total mortality. An inverse relation was observed between HDL cholesterol and total mortality. Multivariate analysis of the data to adjust for possible confounding effects of additional mortality risk factors demonstrated that total cholesterol made no independent contribution to total mortality, but that the contribution of low HDL to mortality persisted after adjustment. CHD mortality consistently increased with rising concentrations of total cholesterol. CHD mortality rates decreased markedly with increasing HDL cholesterol concentrations. After adjustment for age and other risk factors the relation of coronary mortality to HDL cholesterol emerged as the dominant one. There was no clear-cut association between total of HDL cholesterol and cancer mortality. These results indicate that, particularly in older age-groups, measures designed to increase HDL cholesterol may prove as valuable in preventing CHD as those designed to reduce low density lipoprotein cholesterol.

PMID: 6112410 [PubMed - indexed for MEDLINE]

    High-density lipoprotein cholesterol and risk of ischemic stroke mortality. A 21-year follow-up of 8586 men from the Israeli Ischemic Heart Disease Study

Tanne D, Yaari S, Goldbourt U.
Department of Epidemiology and Preventive Medicine, Sackler School of Medicine, Tel-Aviv University, Israel.

BACKGROUND AND PURPOSE: While there is overwhelming evidence relating low levels of HDL cholesterol (HDL-C) with coronary heart disease, the association with cerebrovascular disease is not clear. The aim of the present report was to assess the association between HDL-C levels and ischemic stroke mortality obtained from a long-term follow-up in the Israeli Ischemic Heart Disease Study. METHODS: The subjects of this report are 8586 men, tenured civil servants and municipal employees, aged 42 years or older at the time of HDL-C measurements in 1965. They were followed up for mortality for 21 years. Death due to cerebrovascular disease included the International Classification of Disease, 9th Revision, codes 430 to 438, of which presumed ischemic stroke included codes 433 to 438. RESULTS: During the 21-year follow-up, 295 men died from cerebrovascular events, of which 241 deaths were due to presumed ischemic stroke. Individuals subsequently experiencing a fatal ischemic stroke had a marginally lower age-adjusted mean HDL-C (1.05 mmol/L) and a significantly lower (P < .001) age-adjusted mean percentage of serum cholesterol contained in the HDL fraction (%HDL) (19.3%) than counterparts surviving the follow-up period (1.06 mmol/L and 20.6%, respectively). Decreasing age-adjusted rates of ischemic stroke mortality were observed with increasing %HDL: 14.6, 14.0, and 11.8 per 10,000 person-years in the low, middle, and upper tertiles of %HDL, respectively. In multivariate analysis, a low concentration of HDL-C appeared to be significantly predictive of ischemic stroke mortality. The relative risk associated with a 5% decrease of %HDL was 1.18 (95% confidence interval, 1.03 to 1.34). Men at the lower tertile of HDL-C levels experienced a 1.32-fold increase of covariate-adjusted ischemic stroke mortality risk compared with counterparts at the upper tertile. CONCLUSIONS: In this prospective study of middle-aged and elderly men from a healthy, working population, we have demonstrated an independent negative association between HDL-C and ischemic stroke mortality during a long-term (21-year) follow-up.

PMID: 8996494 [PubMed - indexed for MEDLINE]

    High-density lipoprotein cholesterol and risk of stroke in Japanese men and women

Soyama Y, Miura K, Morikawa Y, Nishijo M, Nakanishi Y, Naruse Y, Kagamimori S, Nakagawa H; Oyabe Study
Department of Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchinada, Ishikawa 920-0293, Japan. ysoyama@kanazawa-med.ac.jp

BACKGROUND AND PURPOSE: Evidence of an inverse relationship between serum high-density lipoprotein cholesterol (HDL-C) and the risk of stroke is sparse in Asians and in women. The purpose of this investigation was to examine the relationship in a long-term cohort study of Japanese men and women among whom stroke occurrence is higher than in Western countries. METHODS: A prospective cohort study was performed involving 4989 participants (1523 men, 3466 women) 35 to 79 years of age at baseline with approximately 10 years of follow-up in a rural area of Japan. End points included all stroke incidence and ischemic stroke incidence. RESULTS: During follow-up, 132 participants developed stroke, including 81 ischemic stroke cases. Age-adjusted incidence rates per 10,000 person-years for all stroke in subjects with low HDL-C (<30 mg/dL [0.78 mmol/L]) were 103.4 in men and 49.3 in women, which were remarkably higher than in subjects with high HDL-C (>or=60 mg/dL [1.56 mmol/L]) (26.4 in men and 15.5 in women). A similar relationship was observed for ischemic stroke. Multivariate-adjusted relative risks for all stroke incidence and ischemic stroke incidence were 2.89 (95% CI, 1.35 to 6.20) and 2.92 (95% CI, 1.17 to 7.32), respectively, for low versus high HDL-C participants. The relationships were independent of sex, age, body mass index, blood pressure, serum total cholesterol, alcohol consumption, and smoking. CONCLUSIONS: This 10-year follow-up study of Japanese men and women demonstrated that lower HDL-C levels were related significantly and independently to increased risk of all stroke incidence and ischemic stroke incidence.

PMID: 12637692 [PubMed - indexed for MEDLINE]

    HDL cholesterol predicts coronary heart disease mortality in older persons.

Corti MC, Guralnik JM, Salive ME, Harris T, Field TS, Wallace RB, Berkman LF, Seeman TE, Glynn RJ, Hennekens CH,
Epidemiology, Demography and Biometry Program, National Institute on Aging/NIH, Bethesda, MD 20892, USA.

OBJECTIVES--To examine the relationship of total cholesterol and high-density lipoprotein cholesterol (HDL-C) with coronary heart disease (CHD) mortality and with occurrence of new CHD events in persons aged 71 years and older. DESIGN--Prospective cohort study with a median of 4.4 years of follow-up. SETTING--East Boston, Mass; New Haven, Conn; and Iowa and Washington counties, Iowa. PARTICIPANTS--A total of 2527 women and 1377 men who completed an interview, had serum lipid determinations, and survived at least 1 year. New CHD events were evaluated in persons with no CHD history or hospitalization. MAIN OUTCOME MEASURES--Death due to CHD (ICD-9 codes 410 through 414 as underlying cause of death); new occurrence of CHD events (fatal CHD or hospitalization with CHD [ICD-9 codes 410 through 414]). RESULTS--After adjustment for established CHD risk factors, the relative risk (RR) of death due to CHD for those with low HDL-C (< 0.90 mmol/L [< 35 mg/dL]) compared with the reference group (HDL-C > or = 1.55 mmol/L [> or = 60 mg/dL]) was 2.5 (95% confidence interval [CI], 1.6 to 4.0). Elevated risk was present in subgroups aged 71 through 80 years (RR, 4.1; 95% CI, 1.9 to 8.8) and over 80 years (RR, 1.8; 95% CI, 0.99 to 3.4), and in men and women. Low HDL-C predicted an increased risk of occurrence of new CHD events (RR, 1.4; 95% CI, 1.1 to 2.0), with similar but nonsignificant results in subgroups of men and women. Total cholesterol was less consistently associated with CHD mortality than HDL-C. When we compared individuals with total cholesterol of at least 6.20 mmol/L (240 mg/dL) with the reference group with total cholesterol of 4.16 to 5.19 mmol/L (161 to 199 mg/dL), a significant risk of CHD mortality was seen for women (RR 1.8; 95% CI, 1.03 to 3.0) but not for men (RR, 1.0; 95% CI, 0.5 to 2.0). In the total population, for each 1-unit increase in the total cholesterol/HDL-C ratio there was a 17% increase in the risk of CHD death that was statistically significant. CONCLUSIONS--Low HDL-C predicts CHD mortality and occurrence of new CHD events in persons older than 70 years. Elevated total cholesterol was not found to be associated with CHD mortality in older men, but may be a risk factor for CHD in older women.

PMID: 7629981 [PubMed - indexed for MEDLINE]