The study used a longitudinal quasi-experimental pre–post intervention design with a non-equivalent comparison group.40 This design is useful when there are practical barriers to randomisation and when an entire unit receives the intervention and a similar unit is available that does not receive the intervention.40 44 The Transparent Reporting of Evaluations with Nonrandomized Designs (TREND) guidelines were used to ensure thorough and transparent reporting45 (see online supplemental appendix 1).
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