Table 1.

Baseline characteristics of the study population

Characteristic	CKD group (n = 152)	Control group (n = 506)	p value
Age (years)	77.2 ± 11.5	62.3 ± 16	< 0.001
eGFR (ml/min)	44.9 ± 12.6	93.7 ± 23.6	< 0.001
Male	86 (56.6%)	288 (56.9%)	0.941
Weight (kg)	77.9 ± 18	81.5 ± 19.3	0.095
Body mass index	28.2 ± 5.6	28.3 ± 6.3	0.818
Obesity	16 (10.5%)	58 (11.5%)	0.749
Smoking	15 (9.9%)	29 (5.7%)	0.073
COPD	10 (6.6%)	38 (7.5%)	0.699
Hypertension	107 (70.4%)	179 (35.4%)	< 0.001
Diabetes	69 (45.4%)	143 (28.3%)	< 0.001
Dyslipidemia	56 (36.8%)	128 (25.3%)	0.005
Malignancy	4 (2.6%)	11 (2.2%)	0.74
Atrial fibrillation	24 (15.8%)	25 (4.9%)	< 0.001
Coronary heart disease	34 (22.4%)	53 (10.5%)	< 0.001
Heart failure	20 (13.2%)	13 (2.6%)	< 0.001
PVD	40 (26.3%)	57 (11.3%)	< 0.001
Previous stroke	21 (13.8%)	27 (5.3%)	< 0.001

Values are presented as absolute numbers (percentage) or as mean ± SD

eGFR was calculated using MDRD formula as mentioned in the Methods section, using baseline serum creatinine before admission to hospitalization. Obesity was defined as BMI > 30

CKD chronic kidney disease, COPD chronic obstructive pulmonary disease, PVD peripheral vascular disease