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Table 3 Results of assessment of methodological quality of observational studies using standardised critical appraisal instruments from the Joanna Briggs institute

From: Effectiveness of primary school-based interventions in improving oral health of children in low- and middle-income countries: a systematic review and meta-analysis

Study

Quality assessment domains

1

2

3

4

5

6

7

8

9

10

11

de Sousa et al. [52, 38]

1

1

1

1

1

3

1

1

1

2

1

Lai et al. [37, 39]

1

1

1

1

1

3

1

1

1

2

1

Monse et al. [22, 24]

1

1

1

1

2

2

1

2

1

2

2

Yusof et al. [50, 36]

1

1

1

1

1

3

1

1

1

2

1

  1. Key: 1 Yes; 2 No; 3 Unclear
  2. Domain 1: Were the two groups similar and recruited from the same population?
  3. Domain 2: Were the exposures measured similarly to assign people to both exposed and unexposed groups?
  4. Domain 3: Was the exposure measured in a valid and reliable way?
  5. Domain 4: Were confounding factors identified?
  6. Domain 5: Were strategies to deal with confounding factors stated?
  7. Domain 6: Were the participants free of the outcome at the start of the study?
  8. Domain 7: Were the outcomes measured in a valid and reliable way?
  9. Domain 8: Was the follow up time reported and long enough for outcomes to occur?
  10. Domain 9: Was follow up complete, and if not, were the reasons to loss to follow up described and explored?
  11. Domain 10: Were strategies to address incomplete follow up utilized?
  12. Domain 11: Was appropriate statistical analysis used?
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BMC Oral Health

ISSN: 1472-6831

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