Correction: Prevalence of limited health literacy among patients with type 2 diabetes mellitus: A systematic review

There were errors in the extraction of numbers used to calculate the prevalence of limited health literacy, resulting in the incorrect extracted values for Souza, J. G., et al (2014), Kim, S. H. (2009), Chen, G. D., et al (2014), van der Heide, I., et al (2014), Aikens JE, Piette JD. (2009), Mancuso, J. M. (2010) and Wallace, A. S., et al (2010) in Table 1. The study with the highest reported prevalence of limited health literacy (76.3%) was conducted to determine the mechanism through with health literacy exerted its influence on health outcomes related to diabetes care. Meta-regression analysis identified two factors that predicted this heterogeneity, the study setting (p = 0.005) and the proportion of participants with more the high school education (p = 0.009).