scholarly journals Evaluating the use of a recommender system for selecting optimal messages for smoking cessation: patterns and effects of user-system engagement

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jinying Chen ◽  
Thomas K. Houston ◽  
Jamie M. Faro ◽  
Catherine S. Nagawa ◽  
Elizabeth A. Orvek ◽  
...  

Abstract Background Motivational messaging is a frequently used digital intervention to promote positive health behavior changes, including smoking cessation. Typically, motivational messaging systems have not actively sought feedback on each message, preventing a closer examination of the user-system engagement. This study assessed the granular user-system engagement around a recommender system (a new system that actively sought user feedback on each message to improve message selection) for promoting smoking cessation and the impact of engagement on cessation outcome. Methods We prospectively followed a cohort of current smokers enrolled to use the recommender system for 6 months. The system sent participants motivational messages to support smoking cessation every 3 days and used machine learning to incorporate user feedback (i.e., user’s rating on the perceived influence of each message, collected on a 5-point Likert scale with 1 indicating strong disagreement and 5 indicating strong agreement on perceiving the influence on quitting smoking) to improve the selection of the following message. We assessed user-system engagement by various metrics, including user response rate (i.e., the percent of times a user rated the messages) and the perceived influence of messages. We compared retention rates across different levels of user-system engagement and assessed the association between engagement and the 7-day point prevalence abstinence (missing outcome = smoking) by using multiple logistic regression. Results We analyzed data from 731 participants (13% Black; 73% women). The user response rate was 0.24 (SD = 0.34) and user-perceived influence was 3.76 (SD = 0.84). The retention rate positively increased with the user response rate (trend test P < 0.001). Compared with non-response, six-month cessation increased with the levels of response rates: low response rate (odds ratio [OR] = 1.86, 95% confidence interval [CI]: 1.07–3.23), moderate response rate (OR = 2.30, 95% CI: 1.36–3.88), high response rate (OR = 2.69, 95% CI: 1.58–4.58). The association between perceived message influence and the outcome showed a similar pattern. Conclusions High user-system engagement was positively associated with both high retention rate and smoking cessation, suggesting that investigation of methods to increase engagement may be crucial to increase the impact of the recommender system for smoking cessation. Trial registration Registration Identifier: NCT03224520. Registration date: July 21, 2017.

Bankarstvo ◽  
2021 ◽  
Vol 50 (1) ◽  
pp. 44-65
Author(s):  
Goran Radivojac ◽  
Boško Mekinjić ◽  
Aleksandra Krčmar

The subject of this paper is an analysis of the impact of the crisis caused by coronavirus on business decisions of issuers whose shares are listed on the Banja Luka Stock Exchange, through the example of dividend payment decisions. For the purpose of determining the factual situation, we observed publicly available financial reports of all companies that paid dividends from profits for 2018 and 2019 and made a comparison of profit retention rates in the two observed periods. We also analyzed other available information on the operations of these issuers. The research results show that in 10 out of 16 cases in which there was dividend payment from profits for 2019, the rate of profit retention increased compared to 2018. In addition to the mentioned 16 cases of dividend payment from the profit for the previous year, two cases were recorded in which dividend payment was made, but from the accumulated profit of previous years, so that the retention rate was not calculated for these issuers. If we take into account the fact that, in almost all cases, the decision on the (non-)payment of dividends was made at a time when uncertainties regarding coronavirus were already present in Republika Srpska, it can be concluded that the impending crisis had an impact on 2019 net results distribution decisions.


2017 ◽  
Vol 46 (1) ◽  
Author(s):  
Bushra Rahim

This paper contributes to the limited literature on the educational outcomes of children in rural Khyber Pakhtunkhwa (KP), Pakistan. It explores the impact of school-level factors such as physical resources, teachers and school characteristics on retention to the last grade of primary in the KP province for the time period 2007-12. Two sources of data were used to measure the retention rates. One of which is an official compilation of institutional data on education known as Education Management Information System (EMIS). The second data source, Annual Status of Education Reports (ASER), is a household data set with a rich set of household covariates, teachers’ characteristics and student performance data on reading and mathematics. The results from regression analyses indicate that children are more likely to complete primary education cycle when they receive instructions in local language and when the pupil-teacher ratio is below a certain threshold. Results also reveal that a continuous increase in school size beyond a certain threshold (> 400 enrollment) is related to a decrease in retention rate. Further, mixed schools (all-boys’ schools having girls enrolled in them) were found to have better retention rates than boys’ schools.


2015 ◽  
Vol 23 (4) ◽  
pp. 227-230 ◽  
Author(s):  
Andrzej Kapusta ◽  
Arkadiusz Duda ◽  
Grzegorz Wiszniewski ◽  
Ryszard Kolman

Abstract The aim of the study was to determine the retention rates of visible implant elastomer (VIE) and coded wire tags (CWT) and the impact tagging had on the growth of Atlantic sturgeon, Acipenser oxyrinchus Mitchill, during an eight-week rearing period under laboratory conditions. Two size groups of young-of-the-year (YOY) sturgeon were used in the study. The tagging was not found to have a significant impact on the final total length or body weight or the condition coefficient of the sturgeon from either size group. Sturgeon survival in the different groups ranged from 90.6 to 100%. Mortality was not noted until two (CWT) and four (VIE) weeks following tagging and was probably not linked to tagging. The retention rate for VIE tags implanted in the rostrum in both size groups was 100%, while for tags implanted at the base of the pectoral fin was 93.5%. The retention of CWT in the smaller fish was 90%, and in the larger sturgeon it was 100%. Tagging small sturgeon with CWT and VIE is minimally invasive, and it did not impact the growth or condition of the tagged fish.


Blood ◽  
2007 ◽  
Vol 110 (11) ◽  
pp. 4839-4839 ◽  
Author(s):  
Robert Foa ◽  
Donna Weber ◽  
Meletios Dimopoulos ◽  
Marta Olesnyckyj ◽  
Zhinuan Yu ◽  
...  

Abstract Background: Historically, patients with IgA multiple myeloma (MM) respond poorly to treatment. In 2 recent phase III trials, Lenalidomide (Len) in combination with Dexamethasone (Dex) led to an overall response (OR) rate of approximately 60% (61% in MM-009 and 60% in MM-010), a complete response (CR) rate of about 15% (14% and 16%, respectively), an overall survival (OS) of at least 29.5 months (29.5 and not yet reached), and a median time to progression (TTP) of at least 11.1 months (11.1 months and 11.3 months, respectively) in patients with relapsed/refractory MM. In both studies, OR, CR, OS and TTP were significantly better with Len/Dex than with Dex alone. Here, we assess the impact of IgA disease on the efficacy and tolerability of treatment with Len/Dex versus Dex alone. Methods: Data were pooled from the MM-009 and MM-010 studies. Patients were randomized to receive Len (25 mg/day on days 1–21 of each 28-day cycle) or placebo. Both groups received Dex 40mg PO q.d. on days 1–4, 9–12, and 17–20 (for the first four cycles). After four cycles, Dex 40 mg/day was administered only on days 1–4. Response to therapy, TTP, OS, and adverse events were assessed. Response rate and TTP were based on data obtained before unblinding (June 2005 [MM-009] and August 2005 [MM-010]). Results: Of 154 patients with IgA at baseline, 72 were treated with Len/Dex and 82 with Dex alone. Among those without IgA, 281 received Len/Dex and 269 received Dex alone. Baseline characteristics were balanced between treatment groups. Len/Dex was associated with a significantly higher OR and longer median TTP than Dex alone in patients with and without IgA (Table). In the non-IgA group, patients treated with Len/Dex had a significantly longer OS than those treated with Dex alone. Response, TTP and OS were comparable between IgA and non-IgA patient groups. There was no difference in the incidence of adverse events between patients with and without IgA. Among those with IgA, the most common grade 3–4 adverse events with Len/Dex and Dex alone were neutropenia (37.5% and 2.4%), thrombocytopenia (16.7% and 8.5%), and anemia (11.1% and 7.3%). The respective rates for patients without IgA were 46.5% and 14.5%, 12.1% and 5.7%, and 11.0% and 5.7%. Conclusion: In patients with and in those without IgA MM, Len/Dex treatment induces a high response rate and a prolonged TTP compared with Dex. IgA non-IgA Clinical response, % Len/Dex (n=72) Dex alone (n=82) P Len/Dex (n=281) Dex alone (n=269) P OR 68.1 18.3 <0.001 57.7 23.0 <0.001 CR 18.1 0 NS 14.2 2.6 NS PR 38.9 15.9 NS 35.6 19.3 NS Median TTP, wks 44.3 16.4 <0.001 52.1 20.1 <0.001 Median OS, wks 130.4 102.4 NS 156.0 136.1 <0.05


2020 ◽  
Vol 30 (Supplement_3) ◽  
pp. iii4-iii9 ◽  
Author(s):  
Mary E Thompson ◽  
Pete Driezen ◽  
Christian Boudreau ◽  
Nicolas Bécuwe ◽  
Thomas K Agar ◽  
...  

Abstract Background The EUREST-PLUS ITC Europe surveys aim to evaluate the impact of the European Union’s Tobacco Products Directive (EU TPD) implementation within the context of the WHO FCTC. This article describes the methodology of the 2016 (Wave 1) and 2018 (Wave 2) International Tobacco Control 6 European (6E) Country Survey in Germany, Greece, Hungary, Poland, Romania and Spain; the England arm of the 2016 (Wave 1) and 2018 (Wave 2) ITC 4 Country Smoking and Vaping (4CV) Survey; and the 2016 (Wave 10) and 2017 (Wave 11) ITC Netherlands (NL) Survey. All three ITC surveys covering a total of eight countries are prospective cohort studies with nationally representative samples of smokers. Methods In the three surveys across the eight countries, the recruited respondents were cigarette smokers who smoked at least monthly, and were aged 18 and older. At each survey wave, eligible cohort members from the previous waves were retained, regardless of smoking status, and dropouts were replaced by a replenishment sample. Results Retention rates between the two waves of the ITC 6E Survey by country were 70.5% for Germany, 41.3% for Greece, 35.7% for Hungary, 45.6% for Poland, 54.4% for Romania and 71.3% for Spain. The retention rate for England between ITC 4CV1 and ITC 4CV2 was 39.1%; the retention rates for the ITC Netherlands Survey were 76.6% at Wave 10 (2016) and 80.9% at Wave 11 (2017). Conclusion The ITC sampling design and data collection methods in these three ITC surveys allow analyses to examine prospectively the impact of policy environment changes on the use of cigarettes and other tobacco products in each country, to make comparisons across the eight countries.


2011 ◽  
Vol 8 (1) ◽  
pp. 85-103 ◽  
Author(s):  
Lauren Ashleigh Waters ◽  
Benedicte Galichet ◽  
Neville Owen ◽  
Elizabeth Eakin

Background:Taking a representative snapshot of physical activity intervention trial findings published between 1996 and 2006, we empirically evaluated participant characteristics, response and retention rates, and their associations with intervention settings.Methods:A structured database search identified 5 representative health behavior journals, from which 32 research reports of physical activity intervention trials were reviewed. Interventions settings were categorized as workplace, healthcare, home- or community-based. Information on participant and intervention characteristics was extracted and reviewed.Results:The majority of participants were Caucasian (86%), women (66%), healthy but sedentary (63%), and middle-aged (mean age = 51 years). Intervention response rates ranged from 20% to 89%, with the greatest response rate for healthcare and home-based interventions. Compared with nonparticipants, study participants tended to be women, Caucasian, tertiary-educated, and middle-class. Participants in workplace interventions were younger, more educated, and healthier; in community-based interventions, participants were older and more ethnically diverse. Reporting on education and income was inconsistent. The mean retention rate was 78%, with minimal differences between intervention settings.Conclusions:These results emphasize the need for physical activity interventions to target men, socioeconomically disadvantaged, and ethnic minority populations. Consistent reporting of response rate and retention may enhance the understanding of which intervention settings best recruit and retain large, representative samples.


2015 ◽  
Vol 10 (1) ◽  
pp. 85
Author(s):  
Richard Hayman

A Review of: Scarletto, E. A., Burhanna, K. J., & Richardson, E. (2013). Wide awake at 4 AM: A study of late night user behavior, perceptions and performance at an academic library. Journal of Academic Librarianship, 39(5), 371-377. http://dx.doi.org/10.1016/j.acalib.2013.02.006 Abstract Objective – To assess late night library usage, including a demographic profile of students benefitting from late night hours, with an analysis of the services and resources they used, and whether the use of late hours is connected to student success. Design – A mixed-methods approach including quantitative demographic information alongside qualitative user feedback collected using a web-based survey. Setting – A large, public research university library in the United States of America using late night operating hours (11 P.M. to 7:30 A.M.) to create 24-hour library availability 5 days per week. Subjects – Undergraduate and graduate students. Methods – Using the university’s building monitoring database (BMD), researchers collected data on which students were using the library building when late night hours were in effect for fall and spring semesters. Along with the date and time of entry, the BMD collected the university ID number of the students and their email address. Using student ID numbers, information from the BMD was cross-referenced with anonymized demographic information from the university’s institutional planning office, enabling comparisons across a range of other data, including students’ discipline, GPA, and other information. Researchers emailed students the web-based survey, directly targeting users who had made use of the library’s late night operating hours. Survey questions investigated when students used the library, explored student aims when in the library, and asked students to rank the tasks they were trying to accomplish while in the library. In addition, researchers sought student feedback on what services and resources they used during late hours, asking students to identify services and resources they would have liked to use but which were not offered during late night hours, and inquiring about students’ sense of safety and security when using the library late at night. Main Results – In total, researchers report that 5,822 students, representing approximately 21% of the campus population, visited the library during the late hours, for 22,383 visits. Researchers report that 57% of late night users took advantage of the extended hours on more than one occasion, with 39% returning three or more times. Sundays were the most popular day, while Thursdays were least popular. Researchers also tracked entry times, with the most popular entry times occurring between 11 P.M. to 2 A.M., accounting for 80% of all late night visits. While survey respondents were drawn entirely from the late night users, 63% preferred using the library late at night versus standard daytime operating hours. The overall survey response rate was less than 5%. Survey respondents (n=243) reported participating in a variety of activities while visiting during late night library hours, with quiet study (87%), working on projects or papers (72%), and group study (42%) as the most frequently reported activities. Respondents also ranked the top three activities they hoped to accomplish while in the library: quiet study (50%) and work on projects and papers (34%) remained top activities, though group study (20%) fell to fourth place, slightly behind the third-ranked activity of printing or copying documents (22%). Respondents reported their use of services during late night hours, indicating use of the university’s wireless Internet access, library printers, computers, and online databases and electronic resources. The only staff service point available to students during overnight hours, circulation services, was used by 16% of respondents. Regarding student responses about what services were not offered that they would have liked to have available, the researchers reveal that “[f]ood and drink were overwhelmingly the most frequently requested services” (p. 374), followed by a desire for more comfortable furniture and spaces. Some respondents also requested that late night hours be extended to seven days a week. Overall, 96% of those submitting user feedback reported a sense of security, an important consideration for late night hours. Regarding the sample, researchers found that the population of late night library users closely reflected the overall university population. An independent samples t-test comparing the differences between the average GPA of late night users to the average GPA of the overall university population was statistically insignificant. For undergraduates only, there exists a small difference between the retention rate of students using late night hours (84.6%) versus overall university retention rate (80.2%). A Pearson’s chi-squared test revealed a statistically significant association between late night library use and retention rates for both undergraduate and graduate populations when compared to the retention rates of non-late night users across the same student groups. Conclusion – This study reveals that undergraduate students in particular make use of late night hours for studying or other academic activities, and positions the late night model as a successful customer service offering at Kent State University. Although researchers do conclusively connect the availability of late night hours to student retention and academic success, their study points to the need for further research exploring this question.


Author(s):  
Emily Breit ◽  
Samuel Schreyer

This study uses new measures of distance education to assess the impact on retention rates at 4-year public and private non-profit universities in the U.S. We present evidence that the percent of undergraduates enrolled exclusively in distance education courses reduces a university’s freshmen retention rate, particularly for institutions with a relatively low median SAT score.  We find no clear evidence of lower retention rates when undergraduates are enrolled in a combination of on-campus and distance education courses.  These findings suggest increased enrollment through distance education can come at the expense of lower retention.


Author(s):  
Dr. Rashid M. Alhamali

This study investigates the impact of conflict management (CM) styles on team performance. Conflict Management was conceptualized in terms of five styles: avoiding, integrating, dominating, obliging and compromising. Team performance, on the other hand, was operationalized in terms of team cohesion, team communication, innovativeness, and quality. Five hypotheses regarding the impact of each dimension of CM on team performance were postulated. Gathering data via a questionnaire developed for this study from a sample consisted of 231 employees working at 40 teams in Twenty universities selected from 4 regions. Participants in the work sites were visited by the researcher's assistant to collect data and ensure a high response rate. Two hundred and fifty questionnaires were administered by hand, and 231 were returned completely. Using SPSS and AMOS, research data were entered, coded, analyzed and plotted. The results showed that three conflict management styles (integrating, obliging and compromising) had significant positive effects on team performance while two styles (avoiding and dominating) hadsignificant negative effects on team performance.


Blood ◽  
2013 ◽  
Vol 122 (21) ◽  
pp. 370-370 ◽  
Author(s):  
Remy Gressin ◽  
Mary Callanan ◽  
Nicolas Daguindau ◽  
Adrian Tempescul ◽  
Sylvain Carras ◽  
...  

Abstract This prospective phase II trial (Nov 2011- Dec 2012), supported by the LYSA group, aimed to evaluate the impact on PFS of the RiBVD regimen in newly diagnosed, previously untreated, elderly MCL patients (>65 years or not eligible for ASCT) (NCT01457144). Inclusion criteria were: WHO 2008 MCL not previously treated, CD20 positive, ECOG 0-2, AA stage II-IV, no CNS involvement or active HBV/HCV/HIV infection. Patients were scheduled to receive a total of 6 cycles of the RiBVD regimen, if they responded (IWG criteria) after 4 cycles. The regimen was administered every 4 weeks with Rituximab 375 mg/m² IV on day(D)1, Bendamustine 90 mg/m² IV on D1 and 2, Dexamethasone 40 mg/m² IV on D2 and bortezomib (Velcade®) 1.3 mg/m² subcutaneously on D1, 4, 8 and 11. Primary prophylaxis with acyclovir was mandatory for Herpes virus reactivation, but there was no recommendation for bacterial prevention. Herein we present preliminary analysis of the trial after 4 RiBVD cycles. Results: A total of 76 patients were included, one was excluded because of HBV active disease and 5 had insufficient data reported in the database. To date we analyzed 70 patients. Patients characteristics: sex ratio M/F 49/21, median age 72 years (y) [64-83] (2 patients were 64 y old), AAstage II/III-IV 5/65, ECOG 0-1/2 59/11, MIPI score low/intermediate/high 3/19/48. Response: 61 responded (ORR=87%), with 19 in PR (26%) and 42 in CR/CRu (60%). Four patients died from pneumonia (n=1), cardiac arrest (n=2) and one following Progressive Multifocal Leukoencephalopathy. Three patients have progressed after 3 cycles. Sixty one patients were analysed by PETscan after 4 cycles, 39 (64%) reached a CR (30 were in CR/CRu and 9 in PR) and 22 remained PET positive (11 patients were in CR/CRu, 10 in PR and 1 stable). RiBVD cycles: 271 cycles were administered out of 280 planned (97%). Twenty four (9%) were delayed, 10 for toxicity. All but one planned Bendamustine doses (n=542) were administered with dosing modified 17 times (3%), mostly for hematological toxicity (n=14). Regarding Bortezomib, 79% (1028/1084) of planned doses were administered, it was prematurely stopped (56, 4%) for neurotoxicity (10 instances) or hematological side effects (46). Rituximab was not administered in 4 instances. Hematologic toxicities: Over the 271 cycles administered, neutropenia was reported in 104 cycles [56 grade 3/4 (g3/4) (21%)], 2.5% with fever; thrombopenia in 181 cycles [41 g3/4 (15%)]; anemia in 210 cycles, [6 g3/4 (2%)]. Non-hematologic toxicities:Reported in >10% of the cycles were : allergic reactions (10.3%, g3/4 <1%), fatigue (40%, g3/4 5%), fever without neutropenia (12%, g3/4 none), weight loss (12%, g3/4 0%), cutaneous rash (12%, g3/4 1.5%), gastrointestinal (40%, g3/4 1.5% ; diarrhea 8%, constipation 17% or emesis 15%), elevated transaminases (14%, g3/4 1%), creatinin (13%, g3/4 none), or glucose (18%, g3/4 1%) ; neuropathy (sensitive or pain) (25%, g3/4 4%). Serious adverse events (SAE) additional to the 4 deaths, were 12 infections including 3 pneumonias (no pneumocystosis), one listeriosis and 2 herpes zoster. Four febrile neutropenia and 3 cutaneous hypersensitivity episodes were also reported. Conclusion Despite 4 toxic deaths (6%), toxicity appears acceptable and manageable. In particular, subcutaneous bortezomib shows markedly decreased neurotoxicity compared to the IV form. This interim analysis shows that four cycles of RiBVD are very effective for untreated elderly MCL patients (ORR 87%) with a high response rate (CR/CRu 60%) which has been shown to be predictive of a long duration of response. An update of these results will be presented at the ASH meeting together with the molecular response rates after 4 cycles. Disclosures: Gressin: Pfizer: Consultancy; Mundipharma: Consultancy. Cartron:Roche: Membership on an entity’s Board of Directors or advisory committees.


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