FIGURE 2.

Distribution and adjusted HRs (95% CIs) of death by phosphorus density. Cox proportional hazards regression was used to estimate HRs of mortality by phosphorus density by using linear splines with a knot at 0.35 mg/kcal 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, albumin:creatinine ratio, estimated glomerular filtration rate, and low vitamin D concentration. Values were centered at 0.35 mg/kcal, which corresponded to 700 mg/d for a 2000-kcal/d diet, and the graph is truncated at 0.25 and 1.5 mg/kcal for ease of presentation.