Table 2 Distribution of underlying diseases, place of study, and quality of studies
Author | Diabetes (%) | Mean follow-up (years) | Country | Quality of studies |
|---|---|---|---|---|
Zeng et al. [17] | 16.1% | 6.7 | USA | Good |
Wei et al. [19] | 14.5% | 0.49 | USA | Good |
Li et al. [18] | NA | 0.98 | British/Columbia/Canada | Good |
Xie et al. [15] | 9.7% | 0.96 | Spain | Good |
Sørensen et al. [23] | 13.1% | NA | Denmark | Good |
Gau et al. [22] | 11.5% | 0.38 | Taiwan | Good |
Li et al. [16] | 30.1% | 0.99 | British Columbia, Canada | Good |