J. Med. Internet Res. - Associations of internet website use with weight change in a long-term weight loss maintenance program.

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Resumo

CKGROUND: The Weight Loss Maintenance Trial (WLM) compared two long-term weight-maintenance interventions, a personal contact arm and an Internet arm, with a no-treatment control after an initial six-month Phase I weight loss program. The Internet arm focused on use of an interactive website for support of long-term weight maintenance. There is limited information about patterns of website use and specific components of an interactive website that might help promote maintenance of weight loss.OBJECTIVE: This paper presents a secondary analysis of the subset of participants in the Internet arm and focuses on website use patterns and features associated with long-term weight maintenance.METHODS: Adults at risk for cardiovascular disease (CVD) who lost at least 4 kilograms in an initial 20-week group-based, behavioral weight-loss program were trained to use an interactive website for weight loss maintenance. Of the 348 participants, 37% were male and 38% were African American. Mean weight loss was 8.6 kilograms. Participants were encouraged to log in at least weekly and enter a current weight for the 30-month study period. The website contained features that encouraged setting short-term goals, creating action plans, and reinforcing self-management habits. The website also included motivational modules, daily tips, and tailored messages. Based on log-in and weight-entry frequency, we divided participants into three website use categories: consistent, some, and minimal.RESULTS: Participants in the consistent user group (n = 212) were more likely to be older (P = .002), other than African American (P = .02), and more educated (P = .01). While there was no significant difference between website use categories in the amount of Phase I change in body weight (P = .45) or income (P = .78), minimal website users (n = 75) were significantly more likely to have attended fewer Phase I sessions (P = .001) and had a higher initial body mass index (BMI) (P < .001). After adjusting for baseline characteristics including initial BMI, variables most associated with less weight regain included: number of log-ins (P = .001), minutes on the website (P < .001), number of weight entries (P = .002), number of exercise entries (P < .001), and sessions with additional use of website features after weight entry (P = .002).CONCLUSION: Participants defined as consistent website users of an interactive behavioral website designed to promote maintenance of weight loss were more successful at maintaining long-term weight loss.TRIAL REGISTRATION: NCT00054925; http://clinicaltrials.gov/ct2/show/NCT00054925 (Archived by WebCite at http://www.webcitation.org/5rC7523ue).

Resumo Limpo

ckground weight loss mainten trial wlm compar two longterm weightmainten intervent person contact arm internet arm notreat control initi sixmonth phase weight loss program internet arm focus use interact websit support longterm weight mainten limit inform pattern websit use specif compon interact websit might help promot mainten weight lossobject paper present secondari analysi subset particip internet arm focus websit use pattern featur associ longterm weight maintenancemethod adult risk cardiovascular diseas cvd lost least kilogram initi week groupbas behavior weightloss program train use interact websit weight loss mainten particip male african american mean weight loss kilogram particip encourag log least week enter current weight month studi period websit contain featur encourag set shortterm goal creat action plan reinforc selfmanag habit websit also includ motiv modul daili tip tailor messag base login weightentri frequenc divid particip three websit use categori consist minimalresult particip consist user group n like older p african american p educ p signific differ websit use categori amount phase chang bodi weight p incom p minim websit user n signific like attend fewer phase session p higher initi bodi mass index bmi p adjust baselin characterist includ initi bmi variabl associ less weight regain includ number login p minut websit p number weight entri p number exercis entri p session addit use websit featur weight entri p conclus particip defin consist websit user interact behavior websit design promot mainten weight loss success maintain longterm weight losstrial registr nct httpclinicaltrialsgovctshownct archiv webcit httpwwwwebcitationorgrcu

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