KL and chronic kidney disease: After adjusting for age, sex, race/ethnicity, CVD, vitamin D, CKD, hypertension, diabetes, calcium, and phosphorus, a one‐unit increase in WWI was associated with a decrease of 24.75 pg/mL in serum Klotho (Model 3: β = −24.75, 95% CI: −24.84, −24.66).