TABLE 1—

Strengths and Limitations of the Criteria Used for the Review Quality Score

Criteria Set	Strengths	Limitations
Sample	Community- and population-based study design (+1)	Other study design
Sample	Representative sample (+1)	Nonrepresentative sample
Sample	More than 1 SES dimension (+1)	Only 1 SES dimension
Sample	Hierarchical, graded SES categories (+1)	Binary SES variables
Sample	SES–sodium intake association results adjusted for age, gender, BMI, energy (where applicable; +1)	No adjustment for age, gender, BMI, or energy in SES–sodium intake analysis (where applicable)
Presentation	SES–sodium intake association results presented in the form of mean ± SD, SE, confidence interval, and P value (+1)	Incomplete results presented (or data not shown) for SES–sodium intake analysis

Note. BMI = body mass index; SES = socioeconomic status. We assessed articles included in the review on their strengths and limitations according to 3 sets of criteria: sample, analysis, and presentation.