US Task Force Level of evidence | Study design | No (%) of published articles | Bibliography numbers |
---|---|---|---|
Age group I. Mother/baby approach/pre-school children at baseline (≤5-yr- olds) (n = 19) | |||
I: | Randomized controlled trials | 8 (42%) | |
II-1: | Controlled trials without randomization | 3 (16%) | |
II-2: | Cohort or case-controlled studies | 7 (37%) | |
II-3: | Case series | 1 (5%) | [52] |
III | Case reports, Opinions of authorities | 0 | |
Age group II. Schoolchildren and adolescents (n = 18) | |||
I: | Randomized controlled trials | 6 (33%) | |
II-1: | Controlled trials without randomization | 2 (11%) | |
II-2: | Cohort or case-controlled studies | 8 (45%) | |
II-3 | Case series | 2 (11%) | |
III | Case reports, opinions of authorities | 0 |