Table 5 Time points and measurements

Eligibility screen

x

Informed consent

x

Allocation

x

Interventions

T0

T1

T2

T3

T4

T5

T6

T7

Intervention group

Download mobile application

x

Wear activity tracker

O

O

O

O

O

O

Control group

Wear activity tracker

O

O

O

O

O

O

Data measurements

T0

T1

T2

T3

T4

T5

T6

T7

Baseline characteristics

General characteristics

x

Sex, age, ASA, BMI, smoking, alcohol intake

Disease related characteristics

x

Disease, operation

eHealth literacy assessment

x

eHEALS

Protocol compliance (as reported by patients)

1. Cessation of smoking and excessive intake of alcohol

x

Y/N questions in app or with paper form

2. Preoperative nutritional screening and, as needed, assessment and nutritional support

x

Y/N questions in app or with paper form

3. Preoperative carbohydrate treatment

x

Y/N questions in app or with paper form

4. Preoperative prophylaxis against thrombosis

x

Y/N questions in app or with paper form

5. Early mobilization (day of surgery)

O

O

Y/N questions in app or with paper form

6. Early intake of oral fluids and solids (offered the day of surgery)

O

O

Y/N questions in app or with paper form

7. Early removal of urinary catheters and intravenous fluids (morning after surgery)

O

Y/N questions in app or with paper form

8. Use of laxatives

O

Y/N questions in app or with paper form

9. Intake of protein and energy-rich nutritional supplements

O

Y/N questions in app or with paper form

10. Prepare for early discharge

O

Y/N questions in app or with paper form

Postoperative data ≤30 days (retrospective collection)

Length of hospital stay

x

EHR

Overall morbidity ≤30 days

x

EHR

Complications

x

Clavien-Dindo minor: I-II major: III-V

Reoperations

x

EHR

Readmission ≤30 days

x

EHR

In-hospital mortality

x

EHR

Gastrointestinal

Tolerance of solid food

O

Days

Absence of nausea

O

Days

Passage of first flatus

O

Days

Passage of first stool

O

Days

Weight - preoperative

x

Weight at admission, KG

Weight - at discharge

x

Weight at discharge, KG

Activity

Mean preoperative physical activity (steps/day)

O

Activity tracker, steps per day

Postoperative physical activity (steps/day)

O

O

O

Steps per day

Pain

Perceived pain daily postoperative - discharge

O

NRS 1–10*

Compliance with intake of (pain) medication

O

Y/N questions in app or with paper form

T0

T1

T2

T3

T4

T5

T6

T7

PROMS

General quality of life (WHOQol)

x

x

x

x

WHOQoL - BREF

Multidimensional fatigue assessment

x

x

x

Multidimensional fatigue inventory

Physical Activity (IPAQ)

x

x

x

x

IPAQ-short

Disability

x

x

WHODAS2

Patient satisfaction questionnaire

x

Self-developed patient satisfaction questionnaire