Association of coffee consumption with all-cause and cardiovascular disease mortality

Abstract

Objective: To evaluate the association between coffee consumption and mortality from all causes and from cardiovascular disease.

Patients and methods: Data from the Aerobics Center Longitudinal Study representing 43,727 participants with 699,632 person-years of follow-up were included. Baseline data were collected by an in-person interview on the basis of standardized questionnaires and a medical examination, including fasting blood chemistry analysis, anthropometry, blood pressure, electrocardiography, and a maximal graded exercise test, between February 3, 1971, and December 30, 2002. Cox regression analysis was used to quantify the association between coffee consumption and all-cause and cause-specific mortality.

Results: During the 17-year median follow-up, 2512 deaths occurred (804 [32%] due to cardiovascular disease). In multivariate analyses, coffee intake was positively associated with all-cause mortality in men. Men who drank more than 28 cups of coffee per week had higher all-cause mortality (hazard ratio [HR], 1.21; 95% CI, 1.04-1.40). However, after stratification based on age, younger (<55 years old) men and women showed a significant association between high coffee consumption (>28 cups per week) and all-cause mortality after adjusting for potential confounders and fitness level (HR, 1.56; 95% CI, 1.30-1.87 for men; and HR, 2.13; 95% CI, 1.26-3.59 for women).

Conclusion: In this large cohort, a positive association between coffee consumption and all-cause mortality was observed in men and in men and women younger than 55 years. On the basis of these findings, it seems appropriate to suggest that younger people avoid heavy coffee consumption (ie, averaging >4 cups per day). However, this finding should be assessed in future studies of other populations.

Keywords: ACLS; Aerobics Center Longitudinal Study; BMI; CRF; CVD; body mass index; cardiorespiratory fitness; cardiovascular disease.

Figure 1

Kaplan-Meier plots for all-cause mortality due to coffee consumption, ACLS, Dallas, TX, 1979–2003 among women (Figure 1a) and men (Figure 1b).

Figure 2

Multivariate-adjusted hazard ratios and 95% confidence intervals between coffee consumption and all-cause mortality for men and women across age groups (Figure 2a. <55 years and Figure 2b. ≥55 years).

Figure 2

Multivariate-adjusted hazard ratios and 95% confidence intervals between coffee consumption and all-cause mortality for men and women across age groups (Figure 2a. <55 years and Figure 2b. ≥55 years).