162 PROCEDURES For patients and professionals, we collected data at baseline (T0), and after 4 (T1) and 9 months (T2). We used paper and online questionnaires, sent to the participants’ e-mail or home address. Data collection was tailored to LHL patients, for example by allowing help with the questionnaires. Reminders were sent if questionnaires were not returned, after one and two weeks. Professionals helped to collect data on the patients’ clinical parameters from the electronic patient records. RANDOMIZATION AND BLINDING Within-organization randomization was infeasible. Blinding wasn’t possible due to intervention visibility. Patient groups were concealed until study start to prevent bias. MEASURES Below are the primary and secondary outcomes. Supplementary file 2 provides an overview of the references on which these outcomes are based. Primary outcomes for patients Self-management of health behaviours; Salt intake – Item adopted from Humalda et al (2020). We asked how many days a week patients consumed salty foods within nine different food groups. Alcohol – We asked how many days per week patients drank alcohol and the average number of doses on those days. Physical activity – We asked the number of days a week patients did at least 30 minutes of physical activity, based upon O’Halloran et al (2020). We dichotomized into adequate (5-7 days) and inadequate (0-4 days). Fluid intake – We asked millilitres of fluid intake per day. We dichotomized it into inadequate (<1500mL) and adequate (≥1500mL). Medication adherence – The Medication Adherence Report Scale of Chan et al. (2020), 5 items, was used. A total score between 5 and 25 was calculated. Patient activation – Measured with the Patient Activation Measure (PAM-13). The PAM-13 gives a score between 0-100[8].
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