Clare E. Collins|Philip J. Morgan|Penelope Jones|Kate Fletcher|Julia Martin|Elroy J. Aguiar|Ashlee Lucas|Melinda Neve|Robin Callister
A 12-Week Commercial Web-Based Weight-Loss Program for Overweight and Obese Adults: Randomized Controlled Trial Comparing Basic Versus Enhanced Features
University of Newcastle Australia|University of Newcastle Australia|University of Newcastle Australia|University of Newcastle Australia|University of Newcastle Australia|University of Newcastle Australia|University of Newcastle Australia|University of Newcastle Australia
development use webbased programs weight loss increasing rapidly yet rarely evaluated using randomized controlled trials rcts interestingly people attempt weight loss use commercially available programs yet uncommon commercial programs evaluated independently rigorouslyto compare efficacy standard commercial webbased weightloss program basic versus enhanced version web program provided additional personalized efeedback contact provider enhanced versus waitlist control group control weight outcomes overweight obese adultsthis purely webbased trial using closed online user group assessorblinded rct participants randomly allocated basic enhanced 12week webbased program based social cognitive theory control body mass index bmi primary outcomewe enrolled 309 adults 129309 418 male bmi mean 323 sd 4 kgm2 841 260309 retention 12 weeks intentiontotreat analysis showed intervention groups reduced bmi compared controls basic 072 sd 11 kgm2 enhanced 10 sd 14 control 015 sd 082 p 001 lost significant weight basic 21 sd 33 kg enhanced 30 sd 41 control 04 sd 23 p 001 changes waist circumference basic 20 sd 35 cm enhanced 32 sd 47 control 05 sd 30 p 001 waisttoheight ratio basic 001 sd 002 enhanced 002 sd 003 control 00 sd 002 p 001 differences observed basic enhanced groups addition personalized efeedback contact provided limited additional benefits compared basic programa commercial webbased weightloss program efficacious across range weightrelated outcomes lifestyle behaviors achieve clinically important weight loss although provision additional personalized feedback facilitate greater weight loss 12 weeks impact superior participant retention longerterm outcomes requires study research required determine optimal mix program features lead biggest treatment impact timeaustralian new zealand clinical trials registry anzctr 12610000197033