Patients attending the smoking cessation programme at the Virgen del Rocío University Hospital under the SoLoMo clinical trial of the SmokeFreeBrain project and provided with the SoLoMo mobile app will be observed for one year. This mobile app which sends the patients tailored health motivational messages selected by a health recommender system, and based on their user profile retrieved from an electronic health record. Patients' messages feedback and interactions with the app will be analyzed and evaluated following an observational prospective methodology to see whether patients like the messages, and measure the patient engagement with the health recommender system.
Study Type
OBSERVATIONAL
Enrollment
120
Patients in a smoking cessation program will use a mobile application to receive messages and rate them from their smartphones. The messages patient will receive belong to one of the following five topics: general motivation, diet tips, physical exercise tips, personal performance, and the benefits of being a non-smoker. For each one of these topics, there will be a pool of 150 different messages with tailored information for the patient. Topics and messages were approved by a smoking cessation psychologist and a pulmonologist. The selection of the time the messages have to be sent, and the message topic is selected by an health recommender system algorithm based on the patients' user profile (demographic information, message rating information, and app interaction information).
Virgen del Rocío University Hospital
Seville, Spain
Objective quality of the health recommender system
The objective quality of the health recommender system is calculated by measuring its precision. The precision of the health recommender system is the relation between the number of messages patients have rated with positive and/or positive and neutral feedback the first month (baseline), and all subsequent months.
Time frame: Up to 18 months
Subjective quality of the health recommender system
The subjective quality of the health recommender systems is determined by eighteen questions which will be answered using a 1 to 5 point Likert scale by all patients finishing their smoking cessation programme.
Time frame: Up to 18 months
Engagement at aggregated level - Mobile application rolling retention
The percentage of users still active N days after installation. This is a ratio of the number of users whose last day of activity is past day N to the number of users who could have been active on day N. This metric will be assessed throughout the observation until its end.
Time frame: Up to 18 months
Engagement at aggregated level - Mobile application session length distribution
The session length is defined as the length of time between the start of the application event and the end of the application event. The session length determines the engagement as it is relevant to know how much time patients spend in the app per session. This metric will be assessed throughout the observation until its end.
Time frame: Up to 18 months
Engagement at aggregated level - Mobile application usage frequency
The frequency of use is a measure of how often each unique patient used the app within a given time interval. This metric will be assessed throughout the observation until its end.
Time frame: Up to 18 months
Engagement at aggregated level - Number of sessions per user
A session is one use of the mobile application by a patient. This begins when the application is launched and ends when the application is terminated. This metric will be assessed throughout the observation until its end.
Time frame: Up to 18 months
Engagement at aggregated level - Return rate
Return rate measures the percentage of patients who return to the app on a specific time after installation. It is measured by cohort group - that is, based on when patients first opened the app. It is calculated as the ratio of the number of users active on a given period to the size of the cohort. This metric will be assessed throughout the observation until its end.
Time frame: Up to 18 months
Engagement at individual level
Engagement at individual level will be assessed based on the rate of read messages by the patients. This is calculated as the quotient between the messages the patients have read, and the total number of messages the system has sent to the patients. This metric will be assessed throughout the observation until its end.
Time frame: Up to 18 months
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