1. Gillinov AM, Davis EA, Alberg AJ, Rykiel M, Gardner TJ, Cameron DE. Pulmonary embolism in the cardiac surgical patient. Ann Thorac Surg 1992;53:988-991. PMID:
1596161.
2. Samama MM, Dahl OE, Quinlan DJ, Mismetti P, Rosencher N. Quantification of risk factors for venous thromboembolism: a preliminary study for the development of a risk assessment tool. Haematologica 2003;88:1410-1421. PMID:
14687996.
3. Chulay M, Brown J, Summer W. Effect of postoperative immobilization after coronary artery bypass surgery. Crit Care Med 1982;10:176-179. PMID:
7037302.
4. Kamel HK, Iqbal MA, Mogallapu R, Maas D, Hoffmann RG. Time to ambulation after hip fracture surgery: relation to hospitalization outcomes. J Gerontol A Biol Sci Med Sci 2003;58:1042-1045. PMID:
14630887.
5. Taheri PA, Butz DA, Greenfield LJ. Length of stay has minimal impact on the cost of hospital admission. J Am Coll Surg 2000;191:123-130. PMID:
10945354.
6. Murata A, Matsuda S, Kuwabara K, Ichimiya Y, Matsuda Y, Kubo T, et al. Association between hospital volume and outcomes of elderly and non-elderly patients with acute biliary diseases: A national administrative database analysis. Geriatr Gerontol Int 2012.
7. Svendsen ML, Ehlers LH, Ingeman A, Johnsen SP. Higher stroke unit volume associated with improved quality of early stroke care and reduced length of stay. Stroke 2012;43:3041-3045. PMID:
22984009.
8. Fisher SR, Goodwin JS, Protas EJ, Kuo YF, Graham JE, Ottenbacher KJ, et al. Ambulatory activity of older adults hospitalized with acute medical illness. J Am Geriatr Soc 2011;59:91-95. PMID:
21158744.
9. Magheli A, Knoll N, Lein M, Hinz S, Kempkensteffen C, Gralla O. Impact of fast-track postoperative care on intestinal function, pain, and length of hospital stay after laparoscopic radical prostatectomy. J Endourol 2011;25:1143-1147. PMID:
21740262.
10. Sidhu VS, Lancaster L, Elliott D, Brand AH. Implementation and audit of 'Fast-Track Surgery' in gynaecological oncology surgery. Aust N Z J Obstet Gynaecol 2012;52:371-376. PMID:
22681595.
11. Vlug MS, Wind J, Hollmann MW, Ubbink DT, Cense HA, Engel AF, et al. Laparoscopy in combination with fast track multimodal management is the best perioperative strategy in patients undergoing colonic surgery: a randomized clinical trial (LAFA-study). Ann Surg 2011;254:868-875. PMID:
21597360.
12. R Development Core Team. R: a language and environment for statistical computing. Vienna, Austria: The R Foundation for Statistical Computing; 2001.
13. Allet L, Knols RH, Shirato K, de Bruin ED. Wearable systems for monitoring mobility-related activities in chronic disease: a systematic review. Sensors (Basel) 2010;10:9026-9052. PMID:
22163393.
14. Corder K, Brage S, Ekelund U. Accelerometers and pedometers: methodology and clinical application. Curr Opin Clin Nutr Metab Care 2007;10:597-603. PMID:
17693743.
15. Callen BL, Mahoney JE, Grieves CB, Wells TJ, Enloe M. Frequency of hallway ambulation by hospitalized older adults on medical units of an academic hospital. Geriatr Nurs 2004;25:212-217. PMID:
15311196.