Table 2. General characteristics of studies included in comparisons between genders.

Study	Comparison between genders	Number of patients	Country where the study was conducted	Type of donor	Donor age (years)	Recipient age (years)	Immunosuppressive therapy	Collection period	Average supervision type (months)	Newcastle Scale
Neugarten et al25 (1996)	Donor and donor-recipient	651	USA	Both	NR	NR	Ciclosporin	1979 to 1994	NR	7
Buchler et al4 (1997)	Donor	354	France	Deceased	NRa	49	Multiple	1985 to 1995	NR	6
Busson e Benoit5 (1997)	Recipient. donor. and donor-recipient	6,889	France	Deceased	NRa	NRa	NR	1989 to 1992	NR	7
Valdes et al41 (1997)	Donor	858	Spain	Deceased	NRa	NRa	NR	1981 to 1995	NR	7
Ben Hamida et al3 (1999)	Donor and donor-recipient	182	Tunisia	Living	39.3	28.1	Multiple	1986 to 1998	NR	7
Oien et al29 (2007)	Donor	739	Norway	Living	NRa	NRa	Multiple	1994 to 2004	55.1	8
Sánches Garcia et al35 (1989)	Recipient	760	Spain	Deceased	NR	NR	Ciclosporin	1978 to 1988	NR	7
Nyberg et al27 (1997)	Recipient	1,000	Sweden	Both	NRa	NRa	Ciclosporin + prednisolone	1985 to 1993	73	8
Avula et al2 (1998)	Recipient	431	India	Living	43.18	33.87	Multiple	NR	9	6
Meier-KriescheH et al22 (2001)	Recipient	73,477	USA	Both	NRa	NRa	Multiple	1988 to 1997	NR	8
Inoue et al14 (2002)	Recipient and donor-recipient	205	Japan	Both	NRa	NRa	Cisclosporin or FK506	1987 to 2000	NR	7
Moosa23 (2003)	Recipient	542	South Africa	Deceased	NRa	37	Multiple	1976 to 1999	75.6	7
Chen et al6 (2013)	Recipient	766	China	Both	NRa	NRa	Multiple	1988 to 2009	NR	7
Ellison etal8 (1994)	Donor-recipient	3,314	USA	Both	NR	NR	NR	1987 to 1992	NR	8
Shaheen et al38 (1998)b	Donor-recipient	406	Saudi Arabia	Living	31.3	34.3	Ciclosporin	NR	55.2	7
Vereerstraeten et al42 (1999)	Donor-recipient	741	Belgium	Deceased	34.8	36.9	Multiple	1983 to 1997	NR	7
Zeier et al43 (2002)	Donor-recipient	119,195	49 countries	Both	38.3	44.3	NR	1985 to 2000	NR	8
Kayler et al16 (2003)	Donor-recipient	30,258	USA	Living	NRa	NRa	NR	1990 to 1999	NR	8
Kwon e Kwak19 (2004)	Donor-recipient	614	South Korea	Living	NRa	NRa	NR	1979 to 2002	NR	7
Pugliese et al34 (2005)	Donor-recipient	3,233	Italy	Deceased	42.1	44.5	NR	1995 to 2000	NR	8
Jacobs et al15 (2007)	Donor-recipient	730	USA	Living	39.7	46.4	NR	1979 to 1994	NR	8
Gratwohl et al12 (2008)	Donor-recipient	195,516	45 countries	Deceased	38	44.7	NR	1985 to 2004	67.2	8
Kim e Gill17 (2009)	Donor-recipient	117,877	USA	Deceased	NRa	NRa	NR	1990 to 2004	NRa	7
Lankarani et al20 (2009)	Donor-recipient	2,649	Iran	Living	NRa	NRa	NR	1992 to 2005	NR	8
Shaheen et al39 (2010)	Donor-recipient	524	Saudi Arabia	Deceased	33.6	33.9	Múltipla	2003 to 2007	20.9	8
Głyda et al11 (2011)	Donor-recipient	154	Poland	Deceased	NRa	NRa	Múltipla	NR	NR	7
Zukowski et al45 (2011)	Donor-recipient	230	Poland	Deceased	33.1	37.6	NR	NR	NR	8
Abou-Jaoude et al1 (2012)	Donor-recipient	135	Lebanon	Both	NRa	NRa	Múltipla	1998 to 2007	NR	7
Tan et al40 (2012)	Donor-recipient	188,507	USA	Both	NRa	NRa	NR	1988 to 2006	NR	8

NR: not reported; NR^a: not reported in the expected way

^b Prospective cohort.