Table 1.

PICO criteria used for the current systematic review

PICO criteria	Description
Participants	General adult populations
Interventions (exposure)	Highest category of DII
Comparisons	Lowest category of DII
Outcome	HTN, SBP, DBP, FBS, insulin, HOMA-IR
Study design	Observational studies with the design of cross-sectional, case–control or cohort

DII, dietary inflammatory index; HTN, hypertension; SBP, systolic blood pressure; DBP, diastolic blood pressure; FBS, fasting blood sugar; HOMA-IR, homeostatic model assessment of insulin resistance.