Comparisons of quality of life between patients underwent peritoneal dialysis and hemodialysis: a systematic review and meta-analysis

Table 1 Characteristics of included studies

Author (Year)	Country	GDP classification^a	Study design	n	Mean age	% Male	HRQoL tool
Author (Year)	Country	GDP classification^a	Study design	n	Mean age	% Male	SF-36	EQ5D	KDQOL
Merkus (1997) [15]	Netherlands	high income	CS	226	56.02	60.75	Y
Wight (1998) [40]	UK	high income	CS	437	N/A	59.27	Y
Merkus (1999) [10]	Netherlands	high income	Pro	139	56.83	60.54	Y
Blake (2000) [41]	Ireland	high income	CS	112	44.03	70.54	Y
Diaz-Buxo (2000) [42]	USA	high income	CS	19,275	58.66	51.61	Y
Harris (2002) [43]	UK	high income	Pro	174	76.91	66.09	Y
Wasserfallen (2004) [44]	USA	high income	CS	506	63.60	62.21		Y
Kutner (2005) [45]	USA	high income	CS	3302	59.01	N/A	Y		Y
Lee (2005) [26]	UK	high income	CS	382	57.09	58.59	Y	Y	Y
Kalender (2007) [4]	Turkey	upper-middle	CS	141	49.83	57.50	Y
Zhang (2007) [46]	China	upper-middle	CS	1062	58.90	49.44	Y
Sayin (2007) [47]	Turkey	upper-middle	CS	136	44.66	67.75	Y
Borowiak (2009) [48]	Poland	high income	CS	100	59.25	48.00		Y
Kontodimopoulos (2009) [18]	Greece	high income	CS	874	55.39	59.84	Y
Ibrahim (2011) [49]	Malaysia	upper-middle	CS	274	N/A	51.50	Y
Turkmen (2012) [50]	Turkey	upper-middle	CS	154	53.92	55.84	Y
Okpechi (2013) [51]	South Africa	upper-middle	CS	82	37.80	N/A	Y		Y
Czyzewski (2014) [52]	Poland	high income	CS	117	N/A	N/A	Y		Y
Yang (2015) [14]	Singapore	high income	CS	502	57.10	52.40		Y
Kostro (2016) [2]	Poland	high income	CS	69	46.46	36.23	Y		Y
Chang (2016) [53]	Taiwan	high income	CS	1687	55.35	N/A		Y

Abbreviations: GDP Gross domestic product, n Number of participants, HRQoL Health-related quality of life, SF-36 Short Form-36, EQ-5D EuroQol – 5dimension, KDQOL Kidney Disease Quality of Life Instrument, N/A Not available, CS Cross sectional, Pro Prospective, Y Yes; ^a GDP per capita were classified by the World Bank in 2016

ISSN: 1477-7525