Basic characteristics and quality assessment of included literatures
| Studies | Year of publication | Country | ERAS | Non-ERAS | Study quality |
| N, male/female, age (years) mean (SD) | N, male/female, age (years) mean(SD) | ||||
| Auyong DB5 | 2015 | United States | 126, 41\85, 68.44 (9.98) | 126, 44\82, 66.02 (10.02) | B |
| Christelis N6 | 2015 | Australia | 297, 113\184, 67 (10) | 412, 164\248 , 68 (11) | B |
| denHertog A7 | 2012 | Germany | 74, 23\51, 66.58 (8.21) | 73, 20\53, 68.25 (7.91) | B |
| MaempelJF8 | 2015 | England | 84, 42\42, 69.8 (8.9) | 81, 40\44, 70.1 (10.5) | B |
| Malviya A9 | 2011 | England | 1500, 711\789, 68 | 3000, 1482\1518, 69 | B |
| McDonald DA10 | 2012 | England | 1081, 439\642, 69 (11) | 735, 307\428, 70 (13) | B |
| Scott NB11 | 2013 | England | 405, __, 68 (11) | 873, __, 68 (10) | B |
| Stambough JB[12 | 2015 | United States | 488, 247\241, 55 (19) | 281, 126\155, 59 (16) | B |
| Stowers MD13 | 2016 | New Zealand | 100, 47\53, 66.7 (9.2) | 100, 41\59, 65.4 (12.5) | B |
| Talboys R14 | 2016 | France | 50, 12\38, 83 (7.8) | 50, 15\35, 85 (8) | B |
ERAS, enhanced recovery after surgery.