Generic and disease-specific health-related quality of life in patients with Hirschsprung disease: A systematic review and meta-analysis

Table 4 Study quality assessment according to the Newcastle-Ottawa Scale criteria

Ref.	Selection	Comparability	Outcome	Assessment
Amin et al[50], 2018	2 points		2 points	Poor
Baayen et al[70], 2017	1 point		2 points	Poor
Cavusoglu et al[46], 2012	3 points	2 points	2 points	Good
Collins et al[26], 2017	3 points	1 point	3 points	Good
Espeso et al[21], 2019	1 point		2 points	Poor
Hartman et al[53], 2007	2 points		2 points	Poor
Hartman et al[49], 2008	3 points	1 point	3 points	Good
Khalil et al[47], 2015	2 points		3 points	Poor
Lane et al[52], 2016	2 points		3 points	Poor
Meinds et al[17], 2019	3 points	1 point	2 points	Good
Mills et al[25], 2008	3 points	1 point	2 points	Good
Nah et al[33], 2018	3 points	2 points	2 points	Good
Neuvonen et al[23], 2017	3 points	2 points	2 points	Good
Roorda et al[61], 2018	2 points	1 point	2 points	Fair
Sood et al[48], 2018	3 points	1 point	3 points	Good
Townley et al[67], 2019	3 points	1 point	3 points	Good
Xi et al[50], 2018	3 points	2 points	3 points	Good