Date	Event	Description
31 July 2024	Amended	Adding Editorial Note: This Cochrane review is now out of date and should not be used for reference.
25 July 2024	Amended	Adding Editorial Note: This Cochrane review is now out of date and should not be used for reference.
18 July 2019	New citation required and conclusions have changed	The conclusions of this review have changed in that there is more detail about the effects of the three intervention types on preventing obesity for children in the three different age groups, specifying where we found evidence of an effect and where we found no evidence. We assessed the certainty of evidence for this review using the GRADE approach. In this review we have identified and included evidence from low‐ and middle‐income countries. We have made changes to the methods and meta‐analysis, including updating the assessment of risk of bias to account for biases specific to cluster‐RCTs. There have been changes to the composition of the authorship team since the last review was published.
21 May 2019	New search has been performed	In this update, we reran the search up to June 2015 and added 108 new randomised controlled trials (RCTs), bringing the total to 153. We changed the inclusion criteria restricting our search to RCTs and, consequently, have excluded 10 non‐randomised studies present in the version published in 2011. We re‐ran searches again to January 2018 and provide a list of all potentially relevant studies we identified published between 2015 and 2018. RCT publications are accruing on this topic at the rate of approximately 100 per year. This volume of evidence requires changes to the presentation and preparation of the data for this systematic review. Therefore, in the future this review will be split into three separate Cochrane systematic reviews, each with a new protocol, based on age/developmental stage of the children. Data from the 2018 search will be synthesised into those separate reviews.
1 August 2013	Amended	Republished under new editorial group (from Heart to Public Health Group), with no changes to the text of the review.
27 May 2011	New citation required but conclusions have not changed	In this update, we reran the search for studies up to March 2010 and 36 additional new studies have now been included (the previous version of this review included 22 studies, however three of the original 22 studies have now been moved to excluded studies). A meta‐analysis has been conducted and demonstrates marked heterogeneity, but with estimates of effects that are unlikely to be due to chance. Data extraction has been expanded in this review update to include a variety of "implementation factors" to aid contextualisation and utilisation of findings.
3 July 2008	Amended	Converted to new review format.
1 July 2005	New search has been performed	Search strategies run in February 2005. The inclusion criteria were changed to exclude studies published before 1990. Twelve new studies were included. Three long‐term studies of 1 year or more (Caballero 2003; James 2004; Warren 2003) and nine short‐term studies of 3 months to 1 year (Baranowski 2003; Beech 2003; Dennison 2004; Harvey‐Berino 2003; Kain 2004; Neumark‐Sztainer 2003; Pangrazi 2003; Robinson 2003; Story 2003). One study (Simonetti 1986) was excluded because it was published before 1990. This study had been included in earlier version of this review. The conclusions were amended slightly, but the main direction and intent of the conclusions did not change. The background section was updated. The methodology used for this update was changed to include additional search terms and information from study evaluations in keeping with the broader approach of health promotion and public health reviews.
1 April 2002	New search has been performed	Search strategies were rerun and review content updated accordingly.