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Fig. 3 | Trials

Fig. 3

From: Stepped wedge cluster randomized controlled trial designs: a review of reporting quality and design features

Fig. 3

Design characteristics of SW-CRCTs. (a) Number of clusters and (b) time period between steps of the included studies (where clear) is depicted, according to whether the study record is either a completed report or other record type (trial registrations, protocols, conference reports). For completed reports, the final true figures are used; for the other records, the planned amounts are employed. For the box plot of the time periods between steps, 1 month was treated as 4 weeks and 1 year as 52 weeks. Notches are used to display the 95% confidence interval for the median, and the boxplot widths are proportional to the square root of the number of records on which they are based

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