Obesity Reduction Black Intervention Trial (ORBIT): design and baseline characteristics.
BACKGROUND
Obesity is associated with many chronic diseases, and weight loss can reduce the risk of developing these diseases. Obesity is highly prevalent among Black women, but weight loss treatment for black women has been understudied until recently. The Obesity Reduction black Intervention Trial (ORBIT) is a randomized controlled trial designed to assess the efficacy of a culturally proficient weight loss and weight loss maintenance program for black women. This paper describes the design of the trial, the intervention, and baseline characteristics of the participants.


METHODS
Two hundred thirteen obese black women aged 30-65 years were randomized to the intervention group or a general health control group. The intervention consists of a 6-month weight loss program followed by a 1-year maintenance program. Weight, dietary intake, and energy expenditure are measured at baseline, 6 months, and 18 months.


RESULTS
More than 40% of participants had a baseline body mass index (BMI) >40 kg/m(2) (class III obesity). Intake of fat and saturated fat was higher and consumption of fruit, vegetables, and fiber was lower than currently recommended guidelines. Self-reported moderate to vigorous physical activity was high (median 85 min/day). However, objectively measured physical activity among a subgroup of participants was lower (median 15 min/day).


CONCLUSIONS
Weight loss among obese black women has received inadequate attention in relation to the magnitude of the problem. Factors that contribute to successful weight loss and more importantly, weight loss maintenance need to be identified.
Fitzgibbon
Marian L
ML
Department of Medicine, University of Illinois at Chicago, Chicago, Illinois 60608, USA. mlf@uic.edu
Stolley
Melinda
M
Schiffer
Linda
L
Sharp
Lisa
L
Singh
Vicky
V
Van Horn
Linda
L
Dyer
Alan
A
D000328:Adult; D001741:Black or African American / Q000523:psychology*; D000368:Aged; D001294:Attitude to Health / Q000208:ethnology; D001828:Body Image; D015992:Body Mass Index; D004032:Diet / Q000208:ethnology / Q000523:psychology*; D004041:Dietary Fats / Q000008:administration & dosage; D015444:Exercise; D005247:Feeding Behavior / Q000208:ethnology / Q000523:psychology; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D008875:Middle Aged; D018673:Nutrition Policy; D009765:Obesity / Q000208:ethnology / Q000523:psychology* / Q000628:therapy*; D012107:Research Design; D015431:Weight Loss / Q000208:ethnology*; D016387:Women's Health / Q000208:ethnology
D004041:Dietary Fats
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