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Table 2 The Newcastle–Ottawa Scale of individual study

From: Association of ADAMTS proteoglycanases downregulation with IVF-ET outcomes in patients with polycystic ovary syndrome: a systematic review and meta-analysis

Study

Selection

Comparability

Outcome

NOS

Representativeness of the exposed cohort

Selection of the non exposed cohort

Ascertainment of exposure

Demonstration that outcomes was not present at start of study

Comparability on the basis of the design or analysis

Assessment of outcome

Adequate follow-up duration

Adequate follow-up rate

Overall score

Xiao 2014 [28]

1

1

1

1

1

1

1

1

8

Tola 2017 [29]

0

1

1

1

1

1

1

1

7

GohariTaban 2019 [30]

1

1

1

1

1

1

1

1

8

GohariTaban 2021 [31]

1

1

1

1

1

1

1

1

8

Yang 2021 [32]

0

1

1

1

1

1

1

1

7