A Data Point report from the National Center for Education Statistics (NCES) examines literacy and numeracy skills of U.S. men and women. They did not have different literacy scores, but men had higher numeracy scores overall, as well as in each age group and educational attainment level examined. Levels of literacy and numeracy affect how successful patients are in interacting effectively with health care providers.
The report can be obtained at https://nces.ed.gov/pubs2018/2018164.pdf.