KL and diabetes mellitus: Compared to the lowest quartile group, the highest quartile group was older, had a higher proportion of females, more Non-Hispanic white people, higher education levels and PIR levels, higher rates of non-smokers and non-drinkers, were physically active, had lower prevalence of diabetes and hypertension, lower BMI, smaller waist circumference, higher HDL levels, lower creatinine levels and had higher S-Klotho levels, but higher energy intake levels (p < 0.05).