Reviews have been restricted to either a priori patterns (9) or exploratory approaches (10), or have summarized exploratory patterns along with a priori patterns such as the Mediterranean diet (11, 12), although they do not share identical components.
According to the number of questions, which could be answered with “yes,” “no,” or “cannot say,” the studies were rated as low quality, acceptable, or high quality.
Intervention studies were evaluated with an adapted SIGN checklist for randomized controlled trials comprising 10 questions ().
Background: Different methodologic approaches for constructing dietary patterns and differences in their composition limit conclusions on healthful patterns for diabetes prevention.
Objective: We summarized evidence from prospective studies that examined associations of dietary patterns with type 2 diabetes by considering different methodologic approaches.