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. 2018 Feb 13;9:212. doi: 10.3389/fimmu.2018.00212

Table 1.

Summary of critical appraisal of included studies using the Newcastle–Ottawa Quality Assessment Scale for observational studies.

Reference Selection Comparability Outcome

Representativeness Selection of non-exposed Ascertainment of exposure Demonstration outcome not present at start Comparability of cohorts Assessment of outcome Follow up long enough Adequate follow-up rate (≥80%)
Lodi et al. (21) ☆☆
Lima et al. (22) ☆☆
Sterne et al. (23) ☆☆
May et al. (24) ☆☆
Nsanzimana et al. (25) ☆☆
Gabillard et al. (26) ☆☆
Kitahata et al. (13) ☆☆
Garcia et al. (27) ☆☆
Gras et al. (28) ☆☆
Ray et al. (29) ☆☆
Cain et al. (30) ☆☆
Palella et al. (31) ☆☆