Validity of self-reported weight, height, and body mass index among university students in Thailand: Implications for population studies of obesity in developing countries

<p>Abstract</p> <p>Background</p> <p>Large-scale epidemiological studies commonly use self-reported weights and heights to determine weight status. Validity of such self-reported data has been assessed primarily in Western populations in developed countries, although its use is widespread in developing countries. We examine the validity of obesity based on self-reported data in an Asian developing country, and derive improved obesity prevalence estimates using the "reduced BMI threshold" method.</p> <p>Methods</p> <p>Self-reported and measured heights and weights were obtained from 741 students attending an open university in Thailand (mean age 34 years). Receiver operator characteristic techniques were applied to derive "reduced BMI thresholds."</p> <p>Results</p> <p>Height was over-reported by a mean of 1.54 cm (SD 2.23) in men and 1.33 cm (1.84) in women. Weight was under-reported by 0.93 kg (3.47) in men and 0.62 kg (2.14) in women. Sensitivity and specificity for determining obesity (Thai BMI threshold 25 kg/m²) using self-reported data were 74.2% and 97.3%, respectively, for men and 71.9% and 100% for women. For men, reducing the BMI threshold to 24.5 kg/m²increased the estimated obesity prevalence based on self-reports from 29.1% to 33.8% (true prevalence was 36.9%). For women, using a BMI threshold of 24.4 kg/m², the improvement was from 12.0% to 15.9% (true prevalence 16.7%).</p> <p>Conclusion</p> <p>Young educated Thais under-report weight and over-report height in ways similar to their counterparts in developed countries. Simple adjustments to BMI thresholds will overcome these reporting biases for estimation of obesity prevalence. Our study suggests that self-reported weights and heights can provide economical and valid measures of weight status in high school-educated populations in developing countries.</p

Depression, anxiety, stress, social interaction and health-related quality of life in men and women with unexplained chest pain

<p>Abstract</p> <p>Background</p> <p>Unexplained chest pain (UCP) is a common reason for emergency hospital admission and generates considerable health-care costs for society. Even though prior research indicates that psychological problems and impaired quality of life are common among UCP patients, there is lack of knowledge comparing UCP patients with a reference group from the general population. The aim of this study was to analyse differences between men and women with UCP and a reference group in terms of psychosocial factors as depression, anxiety, stress, social interaction and health-related quality of life (HRQOL).</p> <p>Methods</p> <p>A self-administered questionnaire about psychosocial factors was completed by 127 men and 104 women with acute UCP admitted consecutively to the Emergency Department (ED) or as in-patients on a medical ward. A reference group from the general population, 490 men and 579 women, participants in the INTERGENE study and free of clinical heart disease, were selected.</p> <p>Results</p> <p>The UCP patients were more likely to be immigrants, have a sedentary lifestyle, report stress at work and have symptoms of depression and trait-anxiety compared with the reference group. After adjustment for differences in age, smoking, hypertension and diabetes, these factors were still significantly more common among patients with UCP. In a stepwise multivariate model with mutual adjustment for psychosocial factors, being an immigrant was associated with a more than twofold risk in both sexes. Stress at work was associated with an almost fourfold increase in risk among men, whereas there was no independent impact for women. In contrast, depression only emerged as an independent risk factor in women. Trait-anxiety and a low level of social interaction were not independently associated with risk in either men or women. Patients with UCP were two to five times more likely to have low scores for HRQOL.</p> <p>Conclusion</p> <p>Both men and women with UCP had higher depression scores than referents, but an independent association was only found in women. Among men, perceived stress at work emerged as the only psychosocial variable significantly associated with UCP.</p

Association between adolescent idiopathic scoliosis prevalence and age at menarche in different geographic latitudes

BACKGROUND: Age at menarche is considered a reliable prognostic factor for idiopathic scoliosis and varies in different geographic latitudes. Adolescent idiopathic scoliosis prevalence has also been reported to be different in various latitudes and demonstrates higher values in northern countries. A study on epidemiological reports from the literature was conducted to investigate a possible association between prevalence of adolescent idiopathic scoliosis and age at menarche among normal girls in various geographic latitudes. An attempt is also made to implicate a possible role of melatonin in the above association. MATERIAL-METHODS: 20 peer-reviewed published papers reporting adolescent idiopathic scoliosis prevalence and 33 peer-reviewed papers reporting age at menarche in normal girls from most geographic areas of the northern hemisphere were retrieved from the literature. The geographic latitude of each centre where a particular study was originated was documented. The statistical analysis included regression of the adolescent idiopathic scoliosis prevalence and age at menarche by latitude. RESULTS: The regression of prevalence of adolescent idiopathic scoliosis and age at menarche by latitude is statistically significant (p < 0.001) and are following a parallel declining course of their regression curves, especially in latitudes northern than 25 degrees. CONCLUSION: Late age at menarche is parallel with higher prevalence of adolescent idiopathic scoliosis. Pubarche appears later in girls that live in northern latitudes and thus prolongs the period of spine vulnerability while other pre-existing or aetiological factors are contributing to the development of adolescent idiopathic scoliosis. A possible role of geography in the pathogenesis of idiopathic scoliosis is discussed, as it appears that latitude which differentiates the sunlight influences melatonin secretion and modifies age at menarche, which is associated to the prevalence of idiopathic scoliosis

Women's height in several African countries in the first half of the 20th century

Height and its variations in time are considered useful indicators of living conditions in countries and in periods where no written sources are available. Majority of data refer to male stature, whereas data concerning female stature are limited and cover only a short span. This paper investigates the height of 456 women in 6 African countries, born around the end of the 19th century and the beginning of the 20th century. The objective is to provide information on the stature of females from those areas at that time and to compare the results with those from the literature, which refer to more recent times. Data were recovered from original individual forms and/or monographs of the time, and when possible, changes in mean statures were reported, considering two age classes: 20.0–29.9 years and 30.0 years and over. Individual heights were plotted according to year of birth. The main results show tendencies toward height increases in Eritrea and Ethiopia, stable values of stature in Somalia and decreasing heights in women mainly from the oases in Cyrenaica. It has been suggested that these results may reflect the synergic action, with different local modes and intensity, of a changing model of slavery in force at the time, lack of constituted states and continuing civil wars among different ethnic groups, and of an effect of severe droughts in the period under consideration. A comparison with data available on modern populations from 4 of the investigated countries shows that this trend has since changed. Further insights into this suggested trend may be gained from the study of male series

Height trends in males and females from the island of Crete and its prefectures at the turn of the 20th century

This paper aimed to validate the hypothesis that at the beginning of the 20th century, the island of Crete maintained better living conditions in comparison with the rest of Greece. We analysed trends in adult height in both sexes following two steps. In the first, height was considered by sex and birth cohorts for the island as a whole. In the second, the same approach was applied to study the phenomenon in the four prefectures of the island. Average heights were 155.4 +/- 6.2 cm and 168.7 +/- 6.4 cm in females and males, respectively, and the trend in time constantly increases in the latter. The distribution of stature in the four prefectures of the island highlighted the significantly taller stature of the males in Chania, compared to the other three. Our findings report higher average statures compared to those of Cretan conscripts born between 1927 and 1945. Our results confirm that the Cretans were wealthier at the turn of the 20th century, before being annexed to Greece. Moreover, they suggest that the taller statures of the males in the prefecture of Chania may reflect protection action of isolation to the introduction of infectious diseases related to trade flows

Height trends in males and females from the island of Crete and its prefectures at the turn of the 20th century

This paper aimed to validate the hypothesis that at the beginning of the 20th century, the island of Crete maintained better living conditions in comparison with the rest of Greece. We analysed trends in adult height in both sexes following two steps. In the first, height was considered by sex and birth cohorts for the island as a whole. In the second, the same approach was applied to study the phenomenon in the four prefectures of the island. Average heights were 155.4 +/- 6.2 cm and 168.7 +/- 6.4 cm in females and males, respectively, and the trend in time constantly increases in the latter. The distribution of stature in the four prefectures of the island highlighted the significantly taller stature of the males in Chania, compared to the other three. Our findings report higher average statures compared to those of Cretan conscripts born between 1927 and 1945. Our results confirm that the Cretans were wealthier at the turn of the 20th century, before being annexed to Greece. Moreover, they suggest that the taller statures of the males in the prefecture of Chania may reflect protection action of isolation to the introduction of infectious diseases related to trade flows