Table 1 Baseline characteristics by modality at dialysis initiation before and after matching

Demographic data

 Female (n)

188 (37.83%)

78 (41.05%)

0.44

49 (39.2%)

52 (41.6%)

0.70

 Age at dialysis initiation (years)

56.2 ± 16.0

47.6 ± 13.5

<0.01

50.0 ± 15.5

49.6 ± 14.0

0.82

 Duration of follow up (months)

54.6 (36.7, 81.1)

56.78 (39.8, 76.7)

0.83

54.4 (38.3, 90.8)

56.6 (39.9, 75.1)

0.77

Kidney primary disease

 Diabetic nephropathy (n)

114 (22.94%)

22 (11.58%)

0.05

14 (11.2%)

17 (13.6%)

0.57

 Glomerulus nephritis (n)

188 (37.83%)

53 (27.89%)

0.94

42 (33.6%)

40 (32.0%)

0.79

 Polycystic kidney (n)

14 (2.82%)

4 (2.11%)

0.99

3 (2.4%)

4 (3.2%)

1.00

 Obstructive nephropathy (n)

29 (5.83%)

19 (10.00%)

<0.01

12 (9.6%)

10 (8.0%)

0.66

 Other or unknown (n)

152 (30.58%)

92 (48.42%)

<0.01

54 (43.2%)

54 (43.2%)

1.00

Comorbidities

 Charlson Comorbidities Index (CCI)

5.4 ± 2.1

4.1 ± 1.7

<0.01

4.6 ± 2.0

4.4 ± 1.9

0.40

 Diabetes (n)

171 (34.41%)

38 (20.00%)

<0.01

31 (24.8%)

29 (23.2%)

0.77

 Cardiovascular disease (n)

144 (28.97%)

45 (23.68%)

0.16

33 (26.4%)

31 (24.8%)

0.77

 Congestive heart failure (n)

104 (20.93%)

10 (5.26%)

<0.01

6 (4.8%)

9 (7.2%)

0.42

 Cerebrovascular disease (n)

104 (20.93%)

12 (6.32%)

<0.01

17 (13.6%)

12 (9.6%)

0.32

 Chronic pulmonary disease (n)

50 (10.06%)

36 (18.95%)

<0.01

22 (17.6%)

19 (15.2%)

0.61

Laboratory tests

 Serum Urea (mmol/L)

28.3 ± 8.3

22.7 ± 9.1

<0.01

24.9 ± 6.5

25.4 ± 9.2

0.62

 Serum creatinine (umol/L)

977 (798, 1227)

972 (779, 1165)

0.56

947 (787, 1158)

973 (818, 1169)

0.55

 Triglyceride (mmol/L)

1.5 (1.0, 2.1)

1.5 (1.1, 2.2)

0.67

1.6 (1.1, 2.6)

1.5 (1.1, 2.3)

0.44

 Cholesterol (mmol/L)

4.4 ± 1.3

5.2 ± 1.3

<0.01

4.9 ± 1.3

5.0 ± 1.2

0.77

 Plasma albumin (g/L)

37.3 ± 4.1

35.8 ± 5.9

<0.01

37.1 ± 4.4

36.7 ± 4.5

0.52

 Hemoglobin (g/L)

97.7 ± 22.0

96.6 ± 23.7

0.28

96.4 ± 21.3

97.0 ± 24.6

0.85