Consistent with this observation, the strength
of the inverse association with risk
of type 2 diabetes was similar for decaffeinated (multivariate RR 0.81 [95 % CI 0.73 — 0.90]-RRB- and caffeinated
coffee consumption (0.87 [0.83 — 0.91]-RRB- when expressed for a one - cup
increment in
consumption per day and simultaneously included in the multivariate model.
The association between total
coffee consumption and risk
of type 2 diabetes remained similar: the RR for a one - cup
increment in
consumption was 0.86 (95 % CI 0.82 — 0.89) after multivariate adjustment and 0.84 (0.79 — 0.91) after further adjustment for caffeine intake.