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Table 3 Newcastle Ottawa Scale Risk of Bias Ratings

From: Meta-analysis of health state utility values measured by EuroQol 5-dimensions (EQ5D) questionnaire in Chinese women with breast cancer

Newcastle Ottawa Scale Question

First author, year

Cheung 2014 [21]

Wang 2018 [22]

Li

2019 [23]

Ou

2019 [24]

Yang 2020 [20]

Sampling: Were the subjects in the study representative of the entire population from which they were recruited?

Moderate

Low

Low

High

Low

Measurement: Incomplete outcome data: attrition bias due to amount, nature or handling of incomplete outcome data

Low

Low

Low

Low

Moderate

Measurement: Do the analyses adjust for different lengths of follow-up of patients?

Low

Low

Low

Moderate

Low

Measurement: Selective reporting: reporting bias due to selective outcome reporting

Low

Low

Low

Low

Moderate

Additional bias: Bias due to problems not covered elsewhere.

Low

Low

Low

Low

Low

  1. The Newcastle-Ottawa Scale (NOS) [11].