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Table 6 Appraisal of study quality

From: Congenital heart disease diagnosed with echocardiogram in newborns with asymptomatic cardiac murmurs: a systematic review

Observational cohort studies (assessed with NIH tool)a
  Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13 Q14 Scoreb
Ainsworth et al. [28] 2 2 2 2 1 2 2 0 0 0 2 0 2 1 18/28
Rein et al. [29] 2 2 2 2 1 2 2 0 0 2 0 0 2 1 18/28
Gokmen et al. [25] 2 0 2 2 1 2 2 2 2 2 0 2 2 1 22/28
Singh et al. [32] 2 2 2 2 1 2 2 2 2 2 0 1 2 1 23/28
Al-Ammouri et al. [33] 2 2 2 2 1 2 2 0 0 0 2 1 2 1 19/28
Minocha et al. [26] 2 2 2 2 1 2 2 2 2 1 2 1 2 1 24/28
Cross-sectional studies (assessed with NIH tool)
 Azhar et al. [24] 2 2 2 2 1 2 2 2 2 2 0 2 2 1 24/28
 Mackie et al. [30] 2 2 2 2 1 2 2 2 2 0 2 2 2 1 24/28
 Mirzarahimi et al. [31] 2 2 2 0 1 2 2 0 0 0 0 1 2 1 15/28
 Fenster et al. [34] 2 2 2 2 1 2 2 1 2 1 2 1 2 1 23/28
Case reports (assessed with NIH tool)
  Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Score  
Ceresnak et al. [35] 2 2 2 0 2 2 2 1 2 15/18  
Paech et al. [36] 2 2 2 0 2 2 2 1 2 15/18  
  1. aTwo assessors rated each study. In the instance of a dispute, a third assessor was involved and a consensus was reached by majority
  2. bScoring system: 2 = yes; 1 = unclear or not applicable; 0 = no.
  3. Abbreviations: NIH, National Institutes of Health