Table 2. Associations of 24-Hour Dietary Recall Variables With Serum Phosphorus Concentration.

24-Hour Dietary Recall Variable	No. of Patients	Serum Phosphorus Concentration (mg/dL)		P
		Unadjusted Mean (95% confidence interval)	Adjusted Difference* (95% confidence interval)
Energy (kcal)				0.2
<1,500	4,748	3.47 (3.44 to 3.49)	−0.01 (−0.04 to 0.02)
1,500-2,300	5,347	3.45 (3.42 to 3.47)	Reference
>2,300	4,890	3.42 (3.39 to 3.45)	0.02 (−0.01 to 0.06)
500-kcal increase			0.01 (0.00 to 0.02)	0.005
Protein (% energy)				0.4
<13	4,472	3.44 (3.41 to 3.46)	−0.01 (−0.03 to 0.02)
13-17	5,478	3.44 (3.41 to 3.46)	Reference
>17	5,035	3.45 (3.43 to 3.48)	0.01 (−0.01 to 0.04)
10% increase			0.02 (0.00 to 0.04)	0.07
Carbohydrate (% energy)				0.07
<45	4,906	3.44 (3.41 to 3.47)	0.02 (−0.01 to 0.04)
45-55	5,328	3.44 (3.42 to 3.47)	Reference
>55	4,751	3.44 (3.42 to 3.47)	−0.01 (−0.04 to 0.02)
10% increase			−0.01 (−0.02 to 0.00)	0.02
Total fat (% energy)				0.3
<30	5,262	3.44 (3.41 to 3.46)	−0.02 (−0.05 to 0.01)
30-38	5,025	3.44 (3.42 to 3.47)	Reference
>38	4,698	3.44 (3.42 to 3.47)	0 (−0.02 to 0.02)
10% increase			0.01 (−0.01 to 0.02)	0.4
Phosphorus (mg)				<0.001
<900	5,063	3.44 (3.41 to 3.46)	−0.02 (−0.05 to 0.01)
900-1,400	5,052	3.44 (3.41 to 3.46)	Reference
>1,400	4,870	3.45 (3.42 to 3.48)	0.07 (0.04 to 0.1)
500-mg increase			0.03 (0.02 to 0.04)	<0.001

^*Adjusted for age, sex, race/ethnicity, time of day, and fasting status.