Table 4.
Results of meta-analyses with and without dissertations
| Number of studies | Number of participants | Pooled estimate (95% CI) Summary measure |
% change in effect size/CI width | Difference in estimates | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Review | With dissertations | Without dissertations | % lost | With dissertations | Without dissertations | % lost | With dissertations | Without dissertations | ||
| Acute respiratory infections | ||||||||||
| Vitamin C for preventing and treating the common cold (CD000980) | 29 | 27 | 6.9 | 11306 | 11244 | 0.5 | 0.95 (0.92, 0.98) RR |
0.95 (0.93, 0.98) | 0/16.7 | Negligible |
| Infectious diseases | ||||||||||
| Oral iron supplements for children in malaria-endemic areas (CD006589) | 13 | 11 | 15.4 | NR | NR | NA | 0.99 (0.90, 1.09) RR |
0.95 (0.86, 1.05) | 4.0/0.0 | Negligible |
| Developmental, psychosocial and learning problems | ||||||||||
| Household interventions for preventing domestic lead exposure in children (CD006047) | 5 | 4 | 20.0 | 815 | 765 | 6.1 | 0.02 (−0.09, 0.12) MD |
0.00 (−0.11, 0.11) | -/4.8 | - |
| Phonics training for English-speaking poor readers (CD009115) | 10 | 9 | 10.0 | 683 | 665 | 2.6 | 0.47 (0.06, 0.88) SMD |
0.50 (0.06, 0.94) | 6.4/7.3 | Small |
| Music therapy for people with autism spectrum disorder (CD004381) | 2 | 1 | 50.0 | NR | NR | NA | 0.50 (0.22, 0.79) SMD |
0.48 (0.18, 0.77) | 4.0/3.5 | Negligible |
| Intermittent iron supplementation for improving nutrition and development in children 3.5under 12 years of age (CD009085) | 10 | 9 | 10.0 | 1824 | 1774 | 2.7 | 0.51 (0.37, 0.72) RR |
0.53 (0.38, 0.73) | 3.9/0.0 | Negligible |
| Cognitive-behavioral treatment for antisocial behavior in youth in residential treatment (CD005650) | 4 | 3 | 25.0 | 560 | 417 | 25.5 | 0.87 (0.61, 1.25) | 0.84 (0.55, 1.28) | 3.5/14.1 | Negligible |
| ‘Scared Straight’ and other juvenile awareness programs for preventing juvenile delinquency (CD002796) | 7 | 6 | 14.3 | 794 | 715 | 9.9 | 1.68 (1.20, 2.36) | 1.71 (1.19, 2.46) | 1.8/9.5 | Negligible |
| Kinship care for the safety, permanency, and well-being of children removed from the home for maltreatment (CD006546) | 10 | 5 | 50.0 | 2189 | 1396 | 36.2 | −0.24 (−0.35, −0.13) | −0.19 (−0.38, 0.00) | 20.8/72.7 | Large (with change in statistical significance) |