Thesis

Development and validation of an exercise adherence prediction model 109 Table 1 Patient demographic and disease characteristics Variable Overall (n = 196) Adherent (n = 84) Non-adherent (n = 112) p-value Demographic characteristics Male gender (%) 51.5 50.0 52.7 0.36 Median age in years (IQR) 68.0 (64.073.0) 67.0 (64.0-72.0) 68.5 (65.0-74.0) 0.32 Resident of the Netherlands (%) 58.7 64.3 54.5 0.23 Education (%) - Low - Middle - Higher 21.4 53.1 25.5 16.7 45.2 38.1 25.0 58.9 16.1 0.00* Smoking status (%) - Never smoked - Quit smoking - Still smoking 1.5 84.7 13.8 2.4 90.5 7.1 0.9 80.4 18.7 0.08 Adherent to medication (%) 88.8 94.0 84.8 0.25 Disease characteristics GOLD classification (%) - GOLD II - GOLD III - GOLD IV 27.6 36.2 36.2 38.1 26.2 35.7 19.6 43.8 36.6 0.68 MRC-score (%) - 0 - 1 - 2 - 3 - 4 - 5 0.5 5.1 18.4 36.7 27.0 12.3 - 11.9 23.8 36.9 19.1 8.3 0.9 - 14.3 36.6 33.0 15.2 0.01* Median time in years since diagnose (IQR) 10.0 (5.0-14.0) 8.0 (5.0-13.3) 10.0 (6.0-14.0) 0.13 Median depression (IQR) 6.0 (4.0-8.0) 5.0 (4.0-7.0) 6.0 (5.0-10.0) 0.00* *p < 0.05; meaning a significant difference between adherent and non-adherent patients Note: IQR: Inter Quartile Range; Low = elementary education, Middle = secondary education, High = university of applied sciences or research university; GOLD: Global Initiative for Chronic Obstructive Lung Disease. The GOLD guidelines classify patients into four different categories: GOLD I (mild), GOLD II (moderate), GOLD III (severe), or GOLD IV (very severe) based on their level of airflow limitation; MRC-score: Medical Research Council dyspnea scale as a measure of disability in patients with chronic obstructive pulmonary disease

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