Table I.

Univariate analyses in patients with chronic kidney disease.

	Control		SHPT
Variable	No. of patients	%	No. of patients	%	P-value
Total (n=498)	74	100	424	100
Age, years (mean ± SD)	51.26±15.74		49.45±16.33		0.476
Gender					0.047a
Male	53	71.62	252	59.43
Female	21	28.38	172	40.57
Underlying cause					0.445
Primary glomerular diseases	41	55.41	226	53.30
Diabetic nephropathy	2	2.70	31	7.31
Hypertensive nephropathy	12	16.22	70	16.51
Chronic interstitial nephritis	8	10.81	36	8.49
Polycystic kidney	1	1.35	26	6.13
Other	10	13.51	42	9.91
Co-morbid condition
Hypertension	54	72.91	360	84.91	0.011a

^aP<0.05. P values were obtained from comparisons between the SHPT and control group. SHPT, secondary hyperparathyroidism; SD, standard deviation.