“…The exact follow up was not clearly stated in four studies (34,52,56,61). Ten of 11 studies without a control group reported standard criteria for discharge (50)(51)(52)54,56,58,(61)(62)(63)(64). Of the five studies with a control group, one used the same predefined discharge criteria for both groups (53), one study only used standard criteria for the intervention group (60), one study used standard criteria for the intervention group but this was not clearly described for the control group (59), one did not use standard criteria (discharge based on discretion of treating surgeon) (57), and one study did not measure LOS (34).…”