***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: BACKGROUND AND OBJECTIVE : Most clinic-based weight control treatments for youth have been design ed for preadolescent children by using family-based care . However , as adolescents become more autonomous and less motivated by parental influence , this strategy may be less appropriate . This study evaluated a primary care – based , multicomponent lifestyle intervention specifically tailored for overweight adolescent females . METHODS : Adolescent girls ( N = 208 ) 12 to 17 years of age ( mean ± SD : 14.1 ± 1.4 years ) , with a mean ± SD BMI percentile of 97.09 ± 2.27 , were assigned r and omly to the intervention or usual care control group . The gender and developmentally tailored intervention included a focus on adoptable healthy lifestyle behaviors and was reinforced by ongoing feedback from the teen ’s primary care physician . Of those r and omized , 195 ( 94 % ) completed the 6-month posttreatment assessment , and 173 ( 83 % ) completed the 12-month follow-up . The primary outcome was reduction in BMI z score . RESULTS : The decrease in BMI z score over time was significantly greater for intervention participants compared with usual care participants ( −0.15 in BMI z score among intervention participants compared with −0.08 among usual care participants ; P = .012 ) . The 2 groups did not differ in secondary metabolic or psychosocial outcomes . Compared with usual care , intervention participants reported less reduction in frequency of family meals and less fast-food intake . CONCLUSIONS : A 5-month , medium-intensity , primary care – based , multicomponent behavioral intervention was associated with significant and sustained decreases in BMI z scores  among obese adolescent girls compared with those receiving usual care CONTEXT The prevalence of overweight and obesity in children and adolescents is increasing rapidly . In this population , behavioral therapy alone has had limited success in providing meaningful , sustained weight reduction , and pharmacological treatment has not been extensively studied . OBJECTIVE To determine the efficacy and safety of orlistat in weight management of adolescents . DESIGN , SETTING , AND PATIENTS Multicenter , 54-week ( August 2000-October 2002 ) , r and omized , double-blind study of 539 obese adolescents ( aged 12 - 16 years ; body mass index [ BMI ] > or=2 units above the 95th percentile ) at 32 centers in the United States and Canada . INTERVENTIONS A 120-mg dose of orlistat ( n = 357 ) or placebo ( n = 182 ) 3 times daily for 1 year , plus a mildly hypocaloric diet ( 30 % fat calories ) , exercise , and behavioral therapy . MAIN OUTCOME MEASURES Change in BMI ; secondary measures included changes in waist and hip circumference , weight loss , lipid measurements , and glucose and insulin responses to oral glucose challenge . RESULTS There was a decrease in BMI in both treatment groups up to week 12 , thereafter stabilizing with orlistat but increasing beyond baseline with placebo . At the end of the study , BMI had decreased by 0.55 with orlistat but increased by 0.31 with placebo ( P = .001 ) . Compared with 15.7 % of the placebo group , 26.5 % of participants taking orlistat had a 5 % or higher decrease in BMI ( P = .005 ) ; 4.5 % and 13.3 % , respectively , had a 10 % or higher decrease in BMI ( P = .002 ) . At study end , weight had increased 0.53 kg with orlistat and 3.14 kg with placebo ( P<.001 ) . Dual-energy x-ray absorptiometry showed that this difference was explained by changes in fat mass . Waist circumference decreased in the orlistat group but increased in the placebo group ( -1.33 cm vs + 0.12 cm ; P<.05 ) . Generally mild to moderate gastrointestinal tract adverse events occurred in 9 % to 50 % of the orlistat group and in 1 % to 13 % of the placebo group . CONCLUSIONS In combination with diet , exercise , and behavioral modification , orlistat statistically significantly improved weight management in obese adolescents compared with placebo . The use of orlistat for 1 year in this adolescent population did not raise major safety issues although gastrointestinal adverse events were more common in the orlistat group BACKGROUND Sedentary activities such as video gaming are independently associated with obesity .  Active video games , in which players physically interact with images on screen , may help increase physical activity and improve body composition . OBJECTIVE The aim of this study was to evaluate the effect of active video games over a 6-mo period on weight , body composition , physical activity , and physical fitness . DESIGN We conducted a 2-arm , parallel , r and omized controlled trial in Auckl and , New Zeal and . A total of 322 overweight and obese children aged 10 - 14 y , who were current users of sedentary video games , were r and omly assigned at a 1:1 ratio to receive either an active video game up grade package ( intervention , n = 160 ) or to have no change ( control group , n = 162 ) . The primary outcome was the change from baseline in body mass index ( BMI ; in kg/m(2 ) ) . Secondary outcomes were changes in percentage body fat , physical activity , cardiorespiratory fitness , video game play , and food snacking . RESULTS At 24 wk , the treatment effect on BMI ( -0.24 ; 95 % CI : -0.44 , -0.05 ; P = 0.02 ) favored the intervention group . The change ( ±SE ) in BMI from baseline increased in the control group ( 0.34 ± 0.08 ) but remained the same in the intervention group ( 0.09 ± 0.08 ) . There was also evidence of a reduction in body fat in the intervention group ( -0.83 % ; 95 % CI : -1.54 % , -0.12 % ; P = 0.02 ) . The change in daily time spent playing active video games at 24 wk increased ( 10.03 min ; 95 % CI : 6.26 , 13.81 min ; P < 0.0001 ) with the intervention accompanied by a reduction in the change in daily time spent playing nonactive video games ( -9.39 min ; 95 % CI : -19.38 , 0.59 min ; P = 0.06 ) . CONCLUSION An active video game intervention has a small but definite effect on BMI and body composition in overweight and obese children . This trial was registered in the Australian New Zeal and Clinical Trials Registry at http://www.anzctr.org.au/ as ACTRN12607000632493 BACKGROUND Conjugated linoleic acid ( CLA ) is a supplemental dietary fatty acid that decreases fat mass accretion in young animals . OBJECTIVE The aim of this study was to determine CLA 's efficacy with regard to change in  fat and body mass index ( BMI ;  in kg/m(2 ) ) in children . DESIGN We conducted a 7 + /- 0.5-mo r and omized , double-blind , placebo-controlled trial of CLA in 62 prepubertal children aged 6 - 10 y who were overweight or obese but otherwise healthy . The subjects were r and omly assigned to receive 3 g/d of 80 % CLA ( 50:50 cis-9,trans-11 and trans-10,cis-12 isomers ) or placebo in chocolate milk . RESULTS Fifty-three subjects completed the trial ( n = 28 in the  CLA group , n = 25 in the  placebo group ) . CLA attenuated the increase in BMI ( 0.5 + /- 0.8 ) compared with placebo ( 1.1 + /- 1.1 ) ( P = 0.05 ) . The percentage change in body fat measured by dual-energy X-ray absorptiometry was smaller ( P = 0.001 ) in the CLA group ( -0.5 + /- 2.1 % ) than in the placebo group ( 1.3 + /- 1.8 % ) . The change in abdominal body fat as a percentage of total body weight was smaller ( P = 0.02 ) in the CLA group ( -0.09 + /- 0.9 % ) than in the placebo group ( 0.43 + /- 0.6 % ) . There were no significant changes in plasma glucose , insulin , or LDL cholesterol between groups . Plasma HDL cholesterol decreased significantly more ( P = 0.05 ) in the CLA group ( -5.1 + /- 7.3 mg/dL ) than in the placebo group ( -0.7 + /- 8 mg/dL ) . Bone mineral accretion was lower ( P = 0.04 ) in the CLA group ( 0.05 + /- 0.03 kg ) than in the placebo group ( 0.07 + /- 0.03 kg ) . Reported gastrointestinal symptoms did not differ significantly between groups . CONCLUSIONS CLA supplementation for 7 + /- 0.5 mo decreased body fatness in 6 - 10-y-old children who were overweight or obese but did not improve plasma lipids or glucose and decreased HDL more than in the placebo group . Long-term investigation of the safety and efficacy of CLA supplementation in children is recommended Background : The best outcomes for treating childhood obesity have come from comprehensive family-based programmes . However there are questions over their generalizability . Objective : To examine the acceptability and effectiveness of ‘ family-based behavioural treatment ’ ( FBBT ) for childhood obesity in an ethnically and socially diverse sample of families in a UK National Health Service ( NHS ) setting . Methods : In this parallel group , r and omized controlled trial , 72 obese children were r and omized to  FBBT  or a waiting-list control . Primary outcomes were body mass index ( BMI ) and BMI s.d . scores ( SDSs ) . Secondary outcomes were weight , weight SDSs , height , height SDSs , waist , waist SDSs , FM index , FFM index , blood pressure ( BP ) and psychosocial measures . The outcomes were assessed at baseline and after treatment , with analyses of 6-month data performed on an intent-to-treat ( ITT ) basis . Follow-up anthropometric data were collected at 12 months for the treatment group . Results : ITT analyses included all children with baseline data ( n=60 ) . There were significant BMI SDS changes ( P<0.01 ) for the treatment and control groups of −0.11 ( 0.16 ) and −0.10 ( 1.6 ) . The treatment group showed a significant reduction in systolic BP ( −0.24 ( 0.7 ) , P<0.05 ) and improvements in quality of life and eating attitudes ( P<0.05 ) , with no significant changes for the control group . However the between-group treatment effects for BMI , body composition , BP and psychosocial outcomes were not significant . There was no overall change in BMI or BMI SDSs from 0–12 months for the treatment group . No adverse effects were reported . Conclusions : Both treatment and control groups experienced significant reductions in the level of overweight , but with no significant difference between them . There were no significant group differences for any of the secondary outcomes . This trial was registered at http://www.controlled-trials.com/ under IS RCT N 51382628 To decrease BMI in overweight and obese children , improved dietary intake and increased physical activity are key elements . Our objective was to evaluate the impact of a 1-y food and physical activity intervention on energy and macronutrient intake in overweight and obese children . A r and omized open trial was conducted with 92 overweight or obese 10.4 ± 1.08-y-old children . The intervention included 14 group sessions with different themes regarding food and physical activity . Dietary intake was assessed with diet history interviews covering 14 d at baseline and 4-d food records after 1 y and was evaluated according to national dietary recommendations . The control group participated in the same measurements as the intervention group but did not take part in group sessions . After 1 y , both groups had decreased their energy intake ( EI ) relative to total energy expenditure , but the effect was more pronounced for the intervention group than for the control group . At 1 y follow-up , a larger proportion of children in the intervention group compared with the control group met the recommended intake of refined sugar ( P = 0.019 ) . However , the groups did not differ in the proportion children who met the recommended intake of dietary fiber . Further , SFA intake relative to total EI did not differ between the groups at 1 y follow-up . In conclusion , despite a rather comprehensive intervention , only modest effects were achieved with respect to reduced EI and improved macronutrient intake Background / Objectives : To determine if a multi-component family focused education package is more effective than a waiting list control group in treating overweight and obese children . Subjects/ Methods : A 2-year r and omised controlled trial ; 65 overweight and obese children aged 6–14 years were allocated to active intervention in either the first or second year , with body composition monitoring alone in the control period . Anthropometric measurements were undertaken at six monthly intervals and a 7-day food and activity diary were issued . Results : Over the 2 years of the study body mass index ( BMI ) SDS ( z score ) fell significantly in the intervention/control ( I/ 
    Output:
    
Studies reported no significant difference between groups in the likelihood of reduced prevalence of overweight or overweight and obesity .
INTERPRETATION Low- to moderate- quality evidence suggests behavioural treatments are associated with a medium effect in terms of reduced BMI or BMI z-score compared with a small effect shown by combined pharmacological-behavioural interventions .