Presentation of the results, stratified by type of prediction study.

Numbers are column percentages, with absolute numbers in parentheses. Impact and external validation studies (n = 6) were excluded from this table as these items were not applicable. Hence, total n = 65.aThe percentages do not add up to 100%, because studies reported univariable and multivariable models. Further, all studies reporting the full model also reported the final model.数值以列百分比形式呈现，括号内标注对应绝对频数。本表格已排除6项影响性研究与外部验证研究，因此类条目不适用。因此总样本量n=65。注a：因部分研究同时报告了单变量与多变量模型，故各百分比之和未达100%。此外，所有报告完整模型的研究均同步报告了最终模型。