“…The authors of six studies used fixed values such as: a LOS greater than 30 days (Barba et al, 2015;Kozyrskyi, De Coster, & St John, 2002;Lang et al, 2006), LOS greater than 10 days (Dent & Perez-Zepeda, 2015;McAlister & van Walraven, 2019), and, in one study LOS was categorized as low (< 8 days), intermediate (8-13 days), and high (> 13 days) (Beauchet et al, 2013). Finally, in eight articles, the actual LOS was compared with a relative value such as a hospital stay exceeding the diagnosis-related group LOS (Lang et al, 2006;McCusker, Cole, Dendukuri, & Belzile, 2003), the Healthcare Resource Groups (HRG)-predicted LOS by physical and cognitive function score (Carpenter, Bobby, Kulinskaya, & Seymour, 2007), not being discharged more than 24 hours after last time deemed clinically fit in a medical note (Moore, Hartley, & Romero-Ortuno, 2018), being two standard deviations above the mean (Foer, Ornstein, Soriano, Kathuria, & Dunn, 2012), being in the 75th percentile of the LOS distribution (Antonelli Incalzi et al, 2001), or being in the 90th percentile (Brousseau et al, 2019) greater than the fifth quintile limit (Lisk et al, 2019). Unfortunately, in the remaining studies, the criteria used for these assessments were not described in detail.…”