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Table 2 Quality of studies according to Newcastle-Ottawa Scale

From: Association between physical activity and infertility: a comprehensive systematic review and meta-analysis

First author, Year, country

Selection (Max,score4)

Comparability (Max,score2)

Exposure(case-control) or outcome (cohort) (max,score3)

Cohort

 Rich-Edwards, 2002

2

2

2

 Cong, 2016

2

2

1

 Esmaeilzadeh, 2013

2

2

2

 Lei, 2015

3

1

2

 Gudmundsdottir, 2009

4

1

2

 Läänelaid, 2021

3

2

1

Case-control

 Foucaut, 2019

4

1

2

 Green, 1986

3

2

1

 Forman, 1994

3

1

2

 Dhair, 2020

3

2

1