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Table 2 Association between coffee consumption and incidence of atrial fibrillation among men in the Cohort of Swedish Men and women in the Swedish Mammography Cohort, 1998−2009

From: Coffee consumption is not associated with increased risk of atrial fibrillation: results from two prospective cohorts and a meta-analysis

  Coffee consumption, cups/day  
  <2 (1)a 2 to <3 (2) 3 to <4 (3) 4 to <5 (4) ≥5 (6) P trend
Men (n = 41,881)
 Number of cases 742 1,155 813 715 886  
 Person-years 69,946 106,314 83,602 78,990 110,892  
 Age-adjusted RR (95 % CI) 1.00 0.97 (0.88–1.06) 0.93 (0.84–1.03) 0.90 (0.81–1.00) 1.02 (0.92–1.12) 0.74
 Multivariable RR (95 % CI)b 1.00 0.99 (0.90–1.09) 0.99 (0.89–1.09) 0.97 (0.87–1.07) 1.08 (0.98–1.20) 0.10
Women (n = 34,594)
 Number of cases 505 804 617 473 331  
 Person-years 62,699 104,866 84,552 66,627 63,256  
 Age-adjusted RR (95 % CI) 1.00 0.94 (0.84–1.05) 0.95 (0.85–1.07) 0.96 (0.85–1.09) 0.89 (0.77–1.02) 0.17
 Multivariable RR (95 % CI)b 1.00 0.95 (0.85–1.07) 0.98 (0.87–1.10) 0.98 (0.86–1.12) 0.88 (0.76–1.02) 0.17
Men and women combined
 Multivariable RR (95 % CI)b 1.00 0.98 (0.91–1.05) 0.99 (0.91–1.07) 0.97 (0.90–1.05) 1.01 (0.93–1.10) 0.64
  1. aMedian consumption in parenthesis; badjusted for age, education, smoking, histories of cardiac disease, hypertension, diabetes, body mass index, walking/bicycling, family history of myocardial infarction, and consumption of alcohol and tea. Results for men and women combined are also adjusted for sex. CI, confidence interval; RR, relative risk