| Section | Item | | Completely reported | Partially reported | Not reported | Frequency (%) | 95% CI | Frequency (%) | 95% CI | Frequency (%) | 95% CI |
| Title | 1 | Title | 29 (100%) | | 0 | | 0 | | Abstract | 2 | Structured summary | 5 (17.24%) | (−0.16, 0.50) | 24 (82.76%) | (0.68, 0.98) | 0 | |
| Introduction | 3 | Rationale | 26 (89.65%) | (0.78, 1.01) | 3 (10.34%) | (−0.24, 0.45) | 0 | | 4 | Objectives | 28 (96.55%) | (0.90, 1.03) | 1 (3.45%) | (−0.32, 0.39) | 0 | |
| Methods | 5 | Protocol and registration | 5 (17.24%) | (−0.16, 0.50) | 0 | | 24 (82.76%) | (0.68, 0.98) | 6 | Eligibility criteria | 19 (65.52%) | (0.44, 0.87) | 10 (34.48%) | (0.05, 0.64) | 0 | | 7 | Information sources | 22 (75.86%) | (0.58, 0.94) | 5 (17.24%) | (−0.16, 0.50) | 0 | | 8 | Search | 12 (41.38%) | (0.14, 0.69) | 0 | | 17 (58.62%) | (0.35, 0.82) | 9 | Study selection | 22 (75.86%) | (0.58, 0.94) | 2 (6.70%) | (−0.28, 0.42) | 5 (17.24%) | (−0.16, 0.50) | 10 | Data collection process | 5 (17.24%) | (−0.16, 0.50) | 23 (79.31%) | (0.63, 0.96) | 1 (3.45%) | (−0.32, 0.39) | 11 | Data items | 3 (10.34%) | (−0.24, 0.45) | 26 (89.65%) | (0.78, 1.01) | 0 | | S1 | Geometry of the network | 16 (55.17%) | (0.31, 0.80) | 0 | | 13 (44.83%) | (0.18, 0.72) | 12 | Risk of bias within individual studies | 28 (96.55%) | (0.90, 1.03) | 0 | | 1 (3.45%) | (−0.32, 0.39) | 13 | Summary measures | 18 (62.07%) | (0.40, 0.85) | 11 (37.93%) | (0.09, 0.67) | 0 | | 14 | Planned methods of analysis | 23 (79.31%) | (0.63, 0.96) | 1 (3.45%) | (−0.32, 0.39) | 5 (17.24%) | (−0.16, 0.50) | S2 | Assessment of inconsistency | 23 (79.31%) | (0.63, 0.96) | 0 | | 6 (20.69%) | (−0.12, 0.53) | 15 | Risk of bias across studies | 22 (75.86%) | (0.58, 0.94) | 0 | | 7 (24.14%) | (−0.08, 0.56) | 16 | Additional analyses | 14 (48.27%) | (0.29, 0.81) | 0 | | 15 (51.72%) | (0.26, 0.77) |
| Results | 17 | Study selection | 25 (86.21%) | (0.73, 0.99) | 4 (13.79%) | (−0.20, 0.48) | 0 | | S3 | Presentation of network structure | 18 (62.07%) | (0.40, 0.85) | 0 | | 1 (3.45%) | (−0.32, 0.39) | S4 | Summary of network geometry | 1 (3.45%) | (−0.32, 0.39) | 26 (89.65%) | (0.78, 1.01) | 2 (6.70%) | (−0.28, 0.42) | 18 | Study characteristics | 27 (93.10%) | (0.84, 1.03) | 2 (6.70%) | (−0.28, 0.42) | 0 | | 19 | Risk of bias within studies | 26 (89.65%) | (0.78, 1.01) | 1 (3.45%) | (−0.32, 0.39) | 2 (6.70%) | (−0.28, 0.42) | 20 | Results of individual studies | 17 (58.62%) | (0.35, 0.82) | 0 | | 12 (41.38%) | (0.14, 0.69) | 21 | Synthesis of results | 27 (93.10%) | (0.84, 1.03) | 2 (6.70%) | (−0.28, 0.42) | 0 | | S5 | Exploration for inconsistency | 21 (72.41%) | (0.53, 0.92) | 0 | | 8 (27.59%) | (−0.03, 0.59) | 22 | Risk of bias across studies | 13 (44.83%) | (0.18, 0.72) | 0 | | 16 (55.17%) | (0.31, 0.80) | 23 | Results of additional analyses | 8 (27.59%) | (−0.03, 0.59) | 0 | | 21 (72.41%) | (0.53, 0.92) |
| Discussion | 24 | Summary of evidence | 25 (86.21%) | (0.73, 0.99) | 1 (3.45%) | (−0.32, 0.39) | 3 (10.34%) | (−0.24, 0.45) | 25 | Limitations | 28 (96.55%) | (0.90, 1.03) | 0 | | 1 (3.45%) | (−0.32, 0.39) | 26 | Conclusions | 27 (93.10%) | (0.84, 1.03) | 2 (6.70%) | (−0.28, 0.42) | 0 | | 27 | Funding | 21 (72.41%) | (0.53, 0.92) | 0 | | 8 (27.59%) | (−0.03, 0.59) |
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