Inadequate health literacy was observed in 83.8 % of respondents using NVS and 35.7 % with the S-TOFHLA. College education was significantly associated with adequate health literacy using either the NVS or S-TOFHLA; however, other results varied between measures. Using NVS, there was a greater likelihood of adequate health literacy with US birth status (AOR 13.8; 95 % CI, 1.99-95.1), >5 years US residency (AOR 7.6; 95 % CI, 1.3-43.1) and higher antibiotic knowledge scores (AOR 1.7; 95 % CI, 1.2-2.4). Using S-TOFHLA, the odds of adequate health literacy increased with access to a regular care provider (AOR 2.6; 95 % CI, 1.2-5.6). Scores consistent with adequate health literacy on the NVS, but not the S-TOFHLA, were associated with correct beliefs regarding antibiotic use for URIs in comparison to scores of participants with inadequate health literacy