The correlation of spot urinary protein-to-creatinine ratio with 24-h urinary protein excretion in various glomerulopathies

Table 1 The main demographic, clinical, laboratory, and pathology characteristics of the study population (157)

Parameters	Values
Age (yr)	30.45 ± 12.108
Weight (kg)	59.70 ± 15.067
Height (cm)	163.98 ± 11.476
Body mass index (kg/m2)	22.30 ± 5.65
Serum creatinine (mg/dL)	1.00 ± 0.54
24-h urinary creatinine (mg/24-h)	834.12 ± 391.43
Creatinine clearance (ml/min)	75.05 ± 33.55
Spot urine protein (mg/dL)	296.04 ± 159.65
Spot urine creatinine (mg/dL)	108.83 ± 58.01
24-h urine protein excretion (mg/24-h)	3192.78 ± 1959.79
Spot urine protein to creatinine ratio (mg/mg)	3.15 ± 1.52
24-h urine volume	1711.40 ± 882.03
Histopathological diagnosis, n (%)
Focal segmental glomerulosclerosis	52 (33.12)
Membranous glomerulonephritis	44 (28)
Mesangiocapillary glomerulonephritis	28 (17.83)
IgM nephropathy	11 (7)
Lupus nephritis	10 (6.36)
Minimal change disease	4 (2.54)
Others	8 (5.09)

All values are in mean ± SD, unless otherwise specified.

Table 2 Correlation of spot urine protein-to-creatinine ratio with 24-h urinary protein estimation stratified according to age and body mass index

Parameters	No of patients (n)	Correlation coefficient (r)	P value
Age (yr) groups
34-46	35	0.475	0.004
> 47	21	0.780	0.001
BMI (kg/m2) ranges
23-25	24	0.411	0.046
> 25	40	0.459	0.00
Proteinuria
< 3000 mg/d	79	0.021	0.28
≥ 3000 mg/d	78	0.216	0.058

BMI: Body mass index.