Loss of heterozygosity for chromosomes 16q in Wilms tumors predicts outcomes: A meta-analysis

Table 2 Quality assessment of the included studies

Ref.	Selection	Comparability	Outcome	NOS score	Quality
Spreafico et al[27], 2013	4	1	1	6	Moderate
Grundy et al[6], 2005	4	1	1	5	Moderate
Chagtai et al[35], 2016	3	2	2	6	High
Messahel et al[7], 2009	3	1	2	5	High
Grundy et al[2], 1994	3	2	2	6	High
Grundy et al[3], 1998	3	1	2	6	High
Klamt et al[4], 1998	3	2	2	5	Moderate
Skotnicka-Klonowicz et al[36], 2000	4	2	1	5	Moderate
Zhang et al[37], 2002	3	2	2	6	High
Kullendorff et al[38], 2003	3	3	1	5	Moderate
Fernandez et al[22], 2017	3	1	2	6	High