5. SOF outcome 1.12 Low birth weight.
| Trial | Measure of effect | Statistical approach1 | Intervention | Control |
| Kenyon 2012 | RR 0.92 (0.74, 1.14) P = 0.43 | Not cluster trial ‐ calculated OR | 127/605 | 141/613 |
| Mori 2015 | Adjusted OR 0.65 (0.26 to 1.59) trial statistician (H Noma) calculated unpublished OR adjusted for cluster effects and significant variables | Straight into RevMan | 8/251 | 12/247 |
| Richter 2014 | Adjusted | 67/377 | 52/414 | |
| Villar 1992 | OR 0.88 (95% CI 0.67 to 1.16) | Straight into RevMan | 115/1033 | 130/1040 |
| Villar 2001 | Adjusted | 910/11534 | 852/11040 |
1ICC from Piaggio 2001 paper of 0.0004 for ANC trial with average cluster size 426.