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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Clin Trials. 2015 Jul 7;12(6):618–626. doi: 10.1177/1740774515592881

Figure 1.

Figure 1

Estimated proportion of studies with English fluency requirements by ZIP code-level English speaking ability and poverty characteristics. In univariable logistic regression models, the relationship of poverty rate with English language fluency requirements was statistically significant, while the proportions that speak English or speak English less than very well in a ZIP code were not statistically significant.