Table 1:
Included studies (n=501) | |
---|---|
Type of study | |
Single-centre | 431 (86·0%) |
Multicentre (1 country) | 56 (11·2%) |
Multicentre (≥2 countries) | 14 (2·8%) |
Study design | |
Randomised controlled trial | 9 (1·8%) |
Prospective cohort or case-series | 98 (19·6%) |
Retrospective cohort or case-series | 367 (73·3%) |
Unspecified cohort or case-series | 22 (4·4%) |
Other | 5 (1·0%) |
Country income level * | |
Low income | 20 (4·0%) |
Lower-middle income | 207 (41·3%) |
Upper-middle income | 286 (57·1%) |
WHO region † | |
Western Pacific region | 124 (24·8%) |
South-East Asia region | 99 (19·8%) |
Region of the Americas | 72 (14·4%) |
Eastern Mediterranean region | 100 (20·0%) |
European region | 63 (12·6%) |
African region | 46 (9·2%) |
Data are n (%).
12 studies involved more than one country income level.
One study involved four WHO regions.