. 2018 Jun 20;3(5):1171–1182. doi: 10.1016/j.ekir.2018.06.004

Table 2.

Baseline comparisons between patients with and without social security

Variable	Without social insurance (n = 745)	With social insurance (n = 105)	P value
Age, yr	44.1 ± 16.9	49.0 ± 17.6	0.007^a
Women	397 (50.6)	49 (46.7)	0.451
Etiology of ESRD
Diabetes mellitus	238 (31.9)	49 (46.7)	0.001^a
Hypertension	102 (13.7)	18 (17.1)	0.342
Glomerulopathies	157 (21.1)	22 (21)	0.977
APKD	16 (2.1)	4 (3.8)	0.293
Others	34 (4.6)	0 (0)	0.025^a
Unknown	198 (26.6)	8 (7.6)	0.001^a
Comorbidities (%)
Diabetes mellitus	238 (31.9)	53 (50.5)	0.001^a
Hypertension	622 (83.5)	78 (74.3)	0.021^a
Heart disease	22 (3)	9 (8.6)	0.001^a
Lipid disorders	449 (60.3)	79 (75.2)	0.003^a
Autoimmune diseases	147 (19.7)	21 (20)	0.949
Liver disease	13 (1.7)	3 (2.9)	0.433
Cancer	34 (4.6)	0 (0)	0.025^a
Time since diagnosis of CKD, mo	2.42 ± 6.6	2.56 ± 6.5	0.832
History of RRT
Hemodialysis	37 (5)	4 (3.8)	0.605
Peritoneal dialysis	15 (2)	2 (1.9)	0.941
Monthly income
<$100	177 (23.8)	17 (16.2)	0.084
Between $100 and $300	509 (68.3)	73 (69.5)	0.804
> $300	59 (7.9)	15 (14.3)	0.030^a
Laboratory values
Hemoglobin, g/dl	6.2 (3.2−9.9)	6.0 (4.2−8.9)	0.087
Serum urea, mg/dl	306.5 (100−1,799)	317.1 (157−744)	0.534
Serum creatinine, mg/dl	11.6 (1.8−40.1)	12.1 (1.9−24.8)	0.510
CKD-EPI, ml/min per 1.73 m²	5.6 (0.9−12.7)	6.0 (1.2−15.2)	0.221
Serum potassium, mmol/l	7.3 (5.6−14.1)	7.2 (5.6−9.1)	0.242
Serum bicarbonate, mmol/l	7.45 (1.1−18.1)	8.1 (2.6−16.1)	0.051

APKD, adult polycystic kidney disease; CKD, chronic kidney disease; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; ESRD, end-stage kidney disease; RRT, renal replacement therapy RT, renal transplant.

Data are n (%), mean ± SD, or median (range).

P < 0.05 indicates statistical significance.