Table 1 Quality evaluation of included studies
study | Selection | Ascertainment | Causality | Reporting | ||
|---|---|---|---|---|---|---|
Do the patients represent the whole experience of the investigator?a | Was the exposure adequately ascertained? | Was the outcome adequately ascertained?b | Were other alternative causes that may explain the observation ruled out? | Was follow-up long enough for outcomes to occur?b | Are the cases described with sufficient detail? | |
Brunet et al. [7] | Yes | Yes | Yes | Yes | No | No |
Chalouhi et al. [8] | Yes | Yes | Yes | Yes | No | Yes |
Patel et al. [9] | NR | Yes | Yes | Yes | No | Yes |
Chivot et al. [10] | NR | Yes | Yes | Yes | No | Yes |
Hoffman et al. [11] | Yes | Yes | Yes | Yes | No | Yes |
Saito et al. [12] | Yes | Yes | Yes | Yes | Yes | Yes |
Hoffman et al. [13] | Yes | Yes | Yes | Yes | No | Yes |
Kühn et al. [14] | Yes | Yes | Yes | Yes | No | Yes |
Rodriguez et al. [15] | NR | Yes | Yes | Yes | Yes | Yes |
Weinberg et al. [16] | Yes | Yes | Yes | Yes | No | Yes |
Manzoor et al. [17] | Yes | Yes | Yes | Yes | No | Yes |
Umekawa et al. [18] | Yes | No | Yes | No | No | Yes |
Goland et al. [19] | NR | NR | Yes | No | NR | No |
Ahmed et al. [20] | NR | Yes | Yes | Yes | No | Yes |
Kühn et al. [21] | NR | Yes | Yes | Yes | No | Yes |
Chivot et al. [22] | Yes | Yes | Yes | Yes | Yes | Yes |
Kühn et al. [23] | NR | Yes | Yes | Yes | No | Yes |