Fig 1.
Flow diagram of the study screening and selection process.
Table 1.
Characteristics of the included studies.
Table 2.
Quality assessment of included studies.
Fig 2.
Forest plots of the overall effect of salt reduction intervention on SBP (a) and DBP (b).
Table 3.
Results of subgroup analyses according to study or participant characteristics.
Fig 3.
Funnel plots of the included studies in the meta-analysis of the effect of salt reduction intervention on SBP (a) and DBP (b).