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Table 3 Newcastle–Ottawa Scale (NOS) scores for the included studies

From: Women’s sleep position during pregnancy in low- and middle-income countries: a systematic review

 

Selection score

Comparability score

Exposure/Outcome score

Overall score

Owusu et al. 2013

2/5

2/2

2/3

6/10

Lakshmi et al. 2017

1/4

0/2

0/3

1/9

  1. NOS adapted for cross-sectional studies was used for the Owusu et al. study
  2. Maximum scores: selection = 5, comparability = 2, outcome = 3, and overall = 10
  3. High risk of bias: score ≤ 3
  4. Medium risk of bias: score 4–7
  5. Low risk of bias: score ≥ 8
  6. The traditional NOS tool was used for the Lakshmi et al. study
  7. Maximum scores: selection = 4, comparability = 2, exposure = 3 and overall = 9
  8. High risk of bias: score ≤ 3
  9. Medium risk of bias: score 4–6
  10. Low risk of bias: score ≥ 7
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Reproductive Health

ISSN: 1742-4755