The accuracy of self-reported weight by overweight and obese women in an outpatient setting.
OBJECTIVE
To investigate the accuracy of self-reported weight of overweight and obese women and characterisation of under-, correct- and over-reporters based on a number of related variables.


METHODS
Weight was self-reported before entering the study. At baseline, actual weight was recorded, and demographic, health, nutritional, psychological and physical activity questionnaires were completed.


METHODS
A hospital outpatient department.


METHODS
Participants were 131 women aged 18-64 years with a body mass index attending a Comprehensive Weight Management Programme.


METHODS
The accuracy of self-reported weight was investigated for the total group, and the subjects were then categorised into three groups according to accuracy of self-reported weight (under-, correct- and over-reporters). The relationship between these accuracy groups and demographic, health, nutritional, and psychological variables and physical activity was examined, to characterise the under-, correct- and over-reporters.


RESULTS
Although not statistically significantly different, the total group of women tended to underestimate their weight by 0.8 (+/-3.6) kg. Categorisation according to the accuracy groups revealed that 29% underestimated their weight by 2 kg or more, 19% overestimated their weight by 2 kg or more, and only 52% correctly estimated their weight within 2 kg. Some trends and statistically significant differences between the accuracy groups concerning certain variables, e.g. height, age, income, education, contraceptive pill usage, smoking and food choices were evident.


CONCLUSIONS
Self-reported weight of a group of overweight/obese individuals may be a valid and reliable indicator of actual weight, but self-reported weight of an overweight/obese individual can not be interpreted similarly. Further research is necessary to ensure reliable characterisation of under-, over- and correct reporters.
Chronic Diseases of Lifestyle Programme, Medical Research Council, Parowvallei, South Africa.
K
K
Rossouw
M
M
Senekal
I
I
Stander
D000293:Adolescent; D000328:Adult; D001827:Body Height; D015992:Body Mass Index; D001835:Body Weight; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000523:psychology*; D010044:Outpatient Clinics, Hospital; D012650:Self Disclosure; D012907:Smoking; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires