Table 1 Study characteristics. MMSE, the Mini-Mental State Examination; POD, postoperative delirium; RCT, randomized controlled trials
Study | Design | Surgery type | Sample size | Participant | initiation of MMSE | Cutoff point of MMSE | Reported outcomes of interest |
|---|---|---|---|---|---|---|---|
Beloosesky 2002 [26] | Prospective cohort study | Hip surgery | 153 | ≥65 yr | Before surgery | 24 | In-hospital mortality |
Bliemel 2015 [27] | Prospective cohort study | Hip surgery | 399 | ≥60 yr | Before surgery | 27 | 1-year mortality |
Brouquet 2010 [25] | Prospective cohort study | Abdominal surgery | 118 | ≥75 yr | Before surgery | 26 | POD |
Guo 2014 [29] | Prospective cohort study | Hip surgery | 244 | >60 yr | Before surgery | 24 | Total hospitalization days (surgery and rehabilitation) |
1-month/6-months/1- year mortality | |||||||
Häkkinen 2007 [28] | Prospective cohort study | Hip surgery | 117 | ≥65 yr | After surgery | 24 | Length of stay in orthopedic/rehabilitation ward |
1-year mortality | |||||||
Huusko 2000 [19] | RCT | Hip surgery | 243 | ≥65 yr | After surgery | 24 | 3 month/1 year mortality |
Length of stay in rehabilitation ward | |||||||
Jones 2017 [31] | Prospective cohort study | Hip surgery | 383 | ≥65 yr | After surgery | 18 | 6 months Mortality |
Length of stay in orthopedic wards | |||||||
Kalisvaart 2006 [30] | Prospective cohort study | Hip surgery | 603 | ≥70 yr | Before surgery | 24 | POD |
Karni 2013 [33] | Prospective cohort study | Hip surgery | 60 | ≥65 yr. Female | After surgery | 24 | Length of stay in rehabilitation ward |
Kratz 2015 [32] | Prospective cohort study | general, abdominal, and trauma surgery | 178 | >70 yr | Before surgery | 27 | POD |
Lee 2016 [7] | Retrospective cohort study | lumbar spine surgery | 129 | >65 yr | Before surgery | 24 | POD |
Length of stay in hospital | |||||||
Moncada 2005 [35] | Prospective cohort study | Hip surgery | 48 | ≥65 yr | After surgery | 24 | Length of stay in orthopedic/rehabilitation ward |
POD | |||||||
Morghen 2011 [34] | Prospective cohort study | Hip surgery | 386 | ≥65 yr | After surgery | 24 | Length of stay in rehabilitation ward |
Osse 2012 [36] | Prospective cohort study | Cardiac surgery | 125 | ≥70 yr | Before surgery | 28 | POD |
Otano 2015 [38] | Prospective cohort study | Hip surgery | 285 | ≥65 yr | After surgery | 24 | In-hospital mortality Length of stay in rehabilitation ward |
Reissmüller 2006 [37] | Prospective cohort study | Cardiac surgery | 107 | ≥60 yr | Before surgery | 24 | POD |
Rolland 2004 [22] | Prospective cohort study | Hip surgery | 61 | ≥70 yr | After surgery | 20 | Length of stay in rehabilitation ward |
Ruggiero 2016 [21] | Prospective cohort study | Hip surgery | 514 | ≥65 yr | After surgery | 24 | 1-year mortality |
Schaller2012 [23] | Prospective cohort study | Hip surgery | 173 | ≥65 yr | After surgery | 24 | 1 year mortality |
Witlox 2009 [24] | Prospective cohort study | Hip surgery | 76 | ≥75 yr | Before surgery | 24 | POD |
Yukako 2016 [20] | Retrospective cohort study | Colorectal surgery | 156 | ≥75 yr | Before surgery | 24 | POD |