Assessment of Physical Activity by Wearable Technology During Rehabilitation After Cardiac Surgery: Explorative Prospective Monocentric Observational Cohort Study

Figures

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  Figure 1. Timeline of the study design constructed in three evaluation time points: a preoperative inclusion, a 14-day Fitbit-wearing period after discharge, and a 7-day Fitbit-wearing period after a follow-up consult, 4 weeks after discharge. ICF: Informed Consent Form; DAT: Daily Activity Tracking.

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  Figure 2. Study flowchart. CABG: coronary artery bypass graft; RA-MIDCAB: robotically assisted minimally invasive direct coronary artery bypass; OPCAB: off-pump coronary artery bypass; AKI: acute kidney injury.

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  Figure 3. Weekly average number of steps in robotically assisted minimally invasive direct coronary artery bypass (RA-MIDCAB) and off-pump coronary artery bypass (OPCAB) patients plotted over time. Weekly average step count is plotted as median over time. n indicates the number of patients included in the cohort result. P value is for the Mann Whitney U test for the difference between the two groups at that time point. Χ2 results of repeated measures Friedman t test.

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  Figure 4. Boxplots of weekly average number of steps in robotically assisted minimally invasive direct coronary artery bypass (RA-MIDCAB) and off-pump coronary artery bypass (OPCAB) patients. Weekly average step counts is shown as box and whisker plots, presenting medians, 25% and 75% quartiles, minimums, and maximums. n indicates the number of patients included in the cohort result. M_W1: MIDCAB result in week 1; O_W1: OPCAB results in week 1; M_W2: MIDCAB results in week 2; O_W2: OPCAB results in week 2; M_W5: MIDCAB results in week 5; O_W5: OPCAB results in week 5.