Fig. 4: Dose-response meta-analysis of the association between total protein intake and risk of incident T2D.

Data were pooled HRs [95% CIs], calculated by two-stage non-linear dose-response for meta-analysis based on RCS, with HRs were scaled per 1-percentage-point increment in the proportion of energy intake from total protein. Solid blue line denotes HR, dotted blue lines denote corresponding 95% CI, and gray solid line represents the HR equal to 1. Pink dotted lines and arrows indicate cutoff values and points with HR equal to 1.