Characteristics of included Cochrane systematic reviews.

N, number of systematic reviews (unless otherwise indicated).
*Based on 358 systematic reviews unless otherwise specified.
†38 systematic reviews did not find published studies (n = 22) or include studies that had participants <18 (n = 16).
Based on 6,022 studies identified in 358 systematic reviews. Actual number of studies may be less, as some studies may be included in multiple systematic reviews.
‡Based on 353 systematic reviews, 5 systematic reviews were unclear or did not specify total number of participants.
§Based on 351 systematic reviews, 7 systematic reviews were unclear or did not specify total number of participants.
**Based on 394 systematic reviews, two systematic reviews were classified as ‘stable’.
††Based on 358 systematic reviews that identified studies. If a systematic review had greater than one category of intervention, it was double counted (n = 15); total interventions evaluated is 376.
bBased on all 396 systematic reviews.

N：系统综述（systematic review）的数量（另有说明者除外）。
* 除非另有说明，本分析基于358篇系统综述。
† 38篇系统综述未发现已发表的研究（n=22），或纳入了受试者年龄低于18岁的研究（n=16）。
基于358篇系统综述所检索到的6022项研究。由于部分研究可能被多篇系统综述同时纳入，实际纳入的研究数量可能更少。
‡ 基于353篇系统综述，另有5篇系统综述未明确说明或未报告受试者总人数。
§ 基于351篇系统综述，另有7篇系统综述未明确说明或未报告受试者总人数。
** 基于394篇系统综述，其中2篇系统综述被归类为“稳定”。
†† 基于完成研究检索的358篇系统综述。若某篇系统综述包含多于1类干预措施，则会被重复计数（n=15）；最终评估的干预措施总数为376。
b 基于全部396篇系统综述。