FIGURE 1.

Distribution and adjusted HRs (95% CIs) of death by absolute phosphorus intake. Cox proportional hazards regression was used to estimate HRs of mortality by absolute phosphorus intake by using linear splines with a knot at 1400 mg/d adjusted for age, sex, race, ethnicity, poverty:income ratio, total energy intake, BMI, systolic blood pressure, current and former smoking, physical activity, non–HDL cholesterol, log albumin:creatinine ratio, estimated glomerular filtration rate, and low vitamin D concentration. Values were centered at 700 mg/d, and the graph is truncated at 200 and 4000 mg/d for ease of presentation. *The Recommended Dietary Allowance (700 mg/d) represents the daily dietary intake of phosphorus considered sufficient by the Food and Nutrition Board to meet requirements for nearly all (97.5%) healthy adults; **the tolerable upper limit (4000 mg/d) is the highest average phosphorus intake that is likely to pose no adverse health effects to almost all individuals in a general population (1).