Robinson Eric, Oldham Melissa
Department of Psychological Sciences, University of Liverpool, Liverpool, L69 7ZA UK.
BMC Obes. 2016 Apr 26;3:21. doi: 10.1186/s40608-016-0102-8. eCollection 2016.
It has been suggested that a significant proportion of overweight and obese individuals underestimate their weight status and think of themselves as being a healthier weight status than they are. The present study examines the prevalence of weight status misperceptions in a recent sample of UK adults, and tests whether the use of self-reported BMI biases estimation of weight status misperceptions.
Data came from UK adults who took part in the 2013 Health Survey for England. We examined the proportion of overweight vs. normal weight (categorised using self-reported vs. measured BMI) males and females who perceived their weight as being 'about right', as well as how common this perception was among individuals whose waist circumference (WC) placed them at increased risk of ill health.
A large proportion of overweight (according to measured BMI) women (31 %) and men (55 %) perceived their weight as being 'about right' and over half of participants with a WC that placed them at increased risk of future ill health believed their weight was 'about right'. The use of self-reported (vs. measured) BMI resulted in underestimation of the proportion of overweight individuals who identified their weight as 'about right' and overestimation of the number of normal weight individuals believing their weight was 'too heavy'.
A large proportion of UK adults who are overweight misperceive their weight status. The use of self-reported BMI data is likely to produce biased estimates of weight status misperceptions. The use of objectively measured BMI is preferable as it will provide more accurate estimates of weight misperception.
有人认为，相当一部分超重和肥胖个体低估了自己的体重状况，认为自己的体重比实际更健康。本研究调查了英国成年人近期样本中体重状况误判的患病率，并测试了使用自我报告的体重指数（BMI）是否会使体重状况误判的估计产生偏差。
数据来自参与2013年英格兰健康调查的英国成年人。我们调查了将自己的体重视为“合适”的超重与正常体重（根据自我报告与测量的BMI分类）男性和女性的比例，以及这种认知在腰围（WC）使其健康风险增加的个体中有多普遍。
很大一部分超重（根据测量的BMI）女性（31%）和男性（55%）认为自己的体重“合适”，超过一半腰围使其未来健康风险增加的参与者认为自己的体重“合适”。使用自我报告（而非测量）的BMI导致低估了将自己的体重认定为“合适”的超重个体比例，高估了认为自己体重“过重”的正常体重个体数量。
很大一部分超重的英国成年人误判了自己的体重状况。使用自我报告的BMI数据可能会对体重状况误判产生有偏差的估计。使用客观测量的BMI更可取，因为它能提供更准确的体重误判估计。
