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Subgroup analysis of the effect of peer support interventions on hemoglobin A1c levels in studies by predominant race/ethnicity of the participants.
HbA1c = hemoglobin A1c; SMD = standardized mean difference.
Notes: African American subgroup: I2 = 58.60%, P for heterogeneity = .08. Asian subgroup: I2 = 0.00%. Hispanic subgroup: I2 = 17.12%, P for heterogeneity = .30. White non-Hispanic subgroup: I2 = 59.41%, P for heterogeneity = .02.
