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Table 2 Quality assessment of the included studies

From: Effective public health measures to mitigate the spread of COVID-19: a systematic review

Article Selection bias Study design Confounders Blinding Data collection
methods
Withdrawals and drop-outs Global rating
Pan A et al [14] Moderate Moderate N/A N/A weak N/A Moderate
Wang K-W et al [15] Moderate Moderate N/A N/A weak N/A Moderate
Cowling BJ et al [16] Moderate Moderate weak N/A Moderate N/A Moderate
Jüni P et al [17] Moderate Moderate Weak N/A weak N/A weak
Wang J et al [18] Strong Moderate N/A N/A Moderate Strong Strong
Cheng VC-C et al [19] Moderate Moderate Weak N/A Moderate N/A Moderate
Thu TPB et al [20] Moderate Moderate N/A N/A Moderate N/A Moderate
Seong H et al [21], Moderate Moderate Weak N/A Moderate N/A Moderate
Lam HY et al [22] Moderate Moderate N/A N/A Moderate N/A Strong
Salvatore M et al [23] Moderate Moderate N/A N/A Weak N/A Moderate
Meo SA et al [24] Moderate Moderate Weak N/A Moderate N/A Moderate
Xu T-L et al [25] Moderate Moderate N/A N/A Moderate N/A Moderate
Zeng K et al [26] Moderate Moderate N/A N/A Weak N/A Moderate
Wong CKH et al [27] Moderate Moderate N/A N/A Weak N/A Moderate
Siedner MJ et al [28] Moderate Moderate N/A N/A Weak N/A Moderate
Krishnamachari B et al [29] Moderate Moderate Moderate N/A Weak Moderate Moderate
Singh BB et al [30] Weak Moderate N/A N/A Weak N/A Weak
Kepp KP et al [31] Moderate Strong Strong Weak Moderate N/A Moderate