INS and diabetes mellitus: Although VFA (OR 0.996, 95% CI 0.993-0.999; P = 0.023) and SFA (OR 0.997, 95% CI 0.996-1.000; P = 0.007) tended to be protective factors for DR, the associations became insignificant after adjusting for potential confounders (sex, HbA1c, TG, TC, HDL, LDL, smoking history, education, duration of diabetes, and insulin use or FCP) (as shown in Table 2).