Table 4. Quality assessment of studies using the Newcastle-Ottawa scale adapted for cross-sectional studies (n = 6).
Study | Selection | Comparability | Outcome | Study quality | ||||
---|---|---|---|---|---|---|---|---|
Representation of the sample | Sample size | Non-respondents | Assessment of the exposure | Control of confounding factors | Assessment of the outcome | Statistical test | ||
Gopi Krishna et al. [17] | * | * | * | ‡ | † | * | † | Low |
Pozzobon et al. [19] | * | * | * | ‡ | † | * | † | Low |
Ciobanu et al. [20] | * | * | * | ‡ | † | * | † | Low |
Sadique et al. [3] | * | * | * | ‡ | † | * | † | Low |
Stella et al. [21] | * | * | * | † | † | * | † | Low |
Kosturkov et al. [28] | * | * | * | † | † | * | * | Low |
*No description/not justified/incomplete; †Poor quality; ‡Good quality.