Does a healthy diet help weight management among overweight and obese people?
A randomized dietary intervention trial across 4 years examined diet, weight, and obesity incidence (body mass index [BMI] > or = 30 kg/m(2)) differences between study groups. Participants were 1,510 breast cancer survivors with BMI > or = 25 kg/m(2) at entry. Dietary intake was assessed yearly by telephone; weight and height were measured at clinic visits. Intervention participants consumed more fruit, vegetables, and fiber and less energy from fat than control participants during follow-up cross-sectionally (p < .0001) and longitudinally (p < .0001); weight did not differ between study groups at any follow-up visit, and significant weight change difference was observed between groups only in the 1st year (p < .0001). Diet and weight results remained unchanged after stratifying by age and BMI. No difference in obesity incidence was found during follow-up (p > .10) among overweight members of either study group. Without specific efforts to reduce total energy intake, dietary modification does not reduce obesity or result in long-term weight loss.
Saquib
Nazmus
N
Cancer Prevention and Control Program, Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093-0901, USA.
Rock
Cheryl L
CL
Natarajan
Loki
L
Flatt
Shirley W
SW
Newman
Vicky A
VA
Thomson
Cynthia A
CA
Caan
Bette J
BJ
Pierce
John P
JP
D000328:Adult; D000368:Aged; D015992:Body Mass Index; D001943:Breast Neoplasms; D015444:Exercise; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D011939:Mental Recall; D008875:Middle Aged; D009765:Obesity / Q000517:prevention & control*; D050177:Overweight / Q000517:prevention & control*; D017741:Survivors; D015431:Weight Loss / Q000502:physiology*; D055815:Young Adult