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Table 1 Demographic characteristics of the included studies (1.25 group/1.75 group)

From: Long-term effects on PTH and mineral metabolism of 1.25 versus 1.75 mmol/L dialysate calcium in peritoneal dialysis patients: a meta-analysis

Study (year)

Study design

Nation

Participation

Sex ratio (M/F)

Intervention (mmol/L)

Sample size

Mean age (year)

Follow-up time (month)

Dropouts

Stein (1995) [21]

RCT

Britain

CAPD

29.l4/28.l 5

1.25/1.75

43/43

55.3 ± 2.1/

54.2 ± 2.9

12

16/15

Johnson (1996) [22]

RCT

Australia

CAPD

5.6/3.8

1.25/1.75

22/23

59.8 ± 3.1/

60.2 ± 2.8

12

11/12

Sa’nchez (2004) [23]

RCT

Spain

CAPD

NR

1.25/1.75

22/22

56 ± 11 (total)

12

8/12

Jing (2009) [11]

RCT

China

CAPD

13.20/8.16

1.25/1.75

33/24

58.6 ± 13.4/

52.6 ± 15.6

12

2/2

Kang (2012) [24]

Non- RCT

South Korea

PD

22.23/104.86

1.25/1.75

46/190

49.2 ± 10.8/

49.5 ± 13.2

24

0/0

Liang (2014) [12]

Non- RCT

China

CAPD

12.8/13.7

1.25/1.75

20/20

52.87 ± 12.0/

57.0 ± 13.0

12

0/0

Wang (2016) [13]

Non- RCT

China

CAPD

13.17/14.16

1.25/1.75

30/30

56.75 ± 10.21/

54.15 ± 7.75

12

0/0

  1. CAPD Continuous ambulatory peritoneal dialysis, F female, M male, NR not report, PD peritoneal dialysis, RCT randomized controlled trial