155 7 Improving Enhanced Recovery After Surgery (ERAS): The Effect of a Patient-Centred Mobile Application Table 2: Baseline characteristics of included participants. Control group (n=68) APPtimize group (n=72) Male sex 36 (52.9%) 41 (56.9%) Age (years) a 60 (49 - 68) 55 (44 - 68) ASA classification 1 10 (14.7%) 8 (11.1%) 2 43 (63.2%) 57 (79.2%) 3 15 (22.1%) 7 (9.7%) Karnofsky Performance scale a 90 (90 - 100) 100 (90 - 100) BMI (kg/m2) a 25.05 (22.00 – 28.85) 24.00 (22.00 – 27.79) Smoking < 5 pack years 45 (66.2%) 46 (63.9%) ≥ 5 pack years 23 (33.8%) 26 (36.1%) Alcohol (units/week) a 1.0 (0.0 – 4.0) 2.0 (0.0 – 6.8) Indication Benign 26 (38.2%) 31 (43.1%) Ulcerative colitis 3 (4.4%) 8 (11.1%) Diverticulitis* 6 (8.8%) 1 (1.4%) Morbus Crohn 15 (22.1%) 19 (26.4%) Slow transit 1 (1.5%) 1 (1.4%) Other 0 (0%) 2 (2.8%) Malignant 42 (61.8%) 41 (56.9%) Colon cancer 20 (29.4%) 16 (22.2%) Rectosigmoid cancer 1 (1.5%) 1 (1.4%) Rectum cancer 15 (22.1%) 16 (22.2%) Sigmoid cancer 5 (7.4%) 6 (8.3%) Other 2 (2.9%) 3 (4.2%) Procedure Minimal-invasive 63 (92.6%) 65 (90.3%) Open surgery 5 (7.4%) 7 (9.7%) Extent of surgery Minor 11 (16.2%) 9 (12.5%) Major 57 (83.8%) 63 (87.5%) Type of Hospital Teaching 37 (54.4%) 40 (55.6%) Academic 31 (45.6%) 32 (44.4%) Mobile proficiency (MDPQ) b 38.5 (33.5 – 40.0) 38.5 (32.5 – 40.0) a Values are median (IQR), b MDPQ Mobile Device Proficiency Questionnaire (scale 8-40) *Significant difference between groups, p=0.044 Abbreviations: ASA American Society of Anaesthesiology; BMI Body Mass Index; IQR inter quartile range.
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