Measuring the accuracy of self-reported height and weight in a community-based sample of young people

BACKGROUND: Self-reported anthropometric data are commonly used to estimate prevalence of obesity in population and community-based studies. We aim to: 1) Determine whether survey participants are able and willing to self-report height and weight; 2) Assess the accuracy of self-reported compared to measured anthropometric data in a community-based sample of young people.

METHODS: Participants (16-29 years) of a behaviour survey, recruited at a Melbourne music festival (January 2011), were asked to self-report height and weight; researchers independently weighed and measured a sub-sample. Body Mass Index was calculated and overweight/obesity classified as ≥25 kg/m². Differences between measured and self-reported values were assessed using paired t-test/Wilcoxon signed ranks test. Accurate report of height and weight were defined as <2 cm and <2 kg difference between self-report and measured values, respectively. Agreement between classification of overweight/obesity by self-report and measured values was assessed using McNemar's test.

RESULTS: Of 1405 survey participants, 82% of males and 72% of females self-reported their height and weight. Among 67 participants who were also independently measured, self-reported height and weight were significantly less than measured height (p=0.01) and weight (p<0.01) among females, but no differences were detected among males. Overall, 52% accurately self-reported height, 30% under-reported, and 18% over-reported; 34% accurately self-reported weight, 52% under-reported and 13% over-reported. More females (70%) than males (35%) under-reported weight (p=0.01). Prevalence of overweight/obesity was 33% based on self-report data and 39% based on measured data (p=0.16).

CONCLUSIONS: Self-reported measurements may underestimate weight but accurately identified overweight/obesity in the majority of this sample of young people.

The old mind the house: the elderly and their place in the modern Minangkabau family in Indonesia

The many local cultures of Indonesia are often thought of as being more family-oriented than is usual in western societies and taking a more communal approach to providing care for individuals who require it within the context of traditional family and social structures. While this situation does represent an idealized conceptualization of traditional values, the reality of modern life in Indonesia has often not supported the maintenance of such patterns. This paper investigates the dilemma faced by many Minangkabau families in caring for elderly relatives in modern Indonesia. Based on a large study of aging among members of this ethnic group, it describes the social forces that shape modernIndonesian life and their effects on traditional social structures with a focus on the impact of such change on the experience of older individuals. In the context of increasing life expectancy nationwide, care alternatives for the elderly are required as traditional structures either no longer exist or are increasingly inadequate to accommodate the needs of older people who often have significant health problems. This paper focuses on the way Minangkabau families are addressing the needs of older relatives and the changing experience of these elderly themselves relative to the culturally expected norm of the past.