The Urinary Phosphate to Serum Fibroblast Growth Factor 23 Ratio, Deemed the Nephron Index, Is a Useful Clinical Index for Early Stage Chronic Kidney Disease in Patients with Type 2 Diabetes: An Observational Pilot Study

Table 1

Baseline characteristics of patients.

Variables and parameters	Baseline
Age (years)	64 ± 8
Sex, male (%)	4 (27)
BMI (kg/m^2)	26.5 ± 3.3
Duration of diabetes (years)	11 ± 6.2
Diabetic retinopathy, n (%)	9 (60)
Dyslipidemia, n (%)	14 (93)
Hypertension, n (%)	10 (67)
HbA1c (%)	10.3 ± 2.2
HbA1c (mmol/L)	89 ± 24.5
BUN (mg/dL)	14 ± 3.1
Cr (mg/dL)	0.59 [0.50–0.74]
eGFR (mL/min/1.73 m^2)	83 ± 24
Serum magnesium (mg/dL)	1.9 [1.75–2.00]
Serum phosphate (mg/dL)	3.5 ± 0.60
Creatinine clearance (mL/min)	77 ± 23
Urinary albumin excretion (mg/day)	11 (7.9–34)
Urinary phosphate excretion (mg/day)	511 ± 176

Data are expressed as means ± standard deviation (SD), and skewed variables are described as medians with an interquartile range. BMI, body mass index; HbA1c, glycated haemoglobin; BUN, blood urea nitrogen; Cr, creatinine; eGFR, estimated glomerular filtration rate.