Earlier Age at Menarche Is Associated with Body Fat and Negative Body Image in Adult Life.

Earlier age at menarche is one of the well-documented antecedents of a range of adverse health effects in adulthood including obesity and psychopathological effects. Yet, few researchers have examined the potential association of menarcheal age with body fat distribution, self-perception, and body image. We retrospectively tested a sample (N = 392) of adult women (18-80 years) to examine the associations of age at menarche with body composition and body image indices. Analyses of covariance and multivariable logistic and linear regression were fitted adjusting for age, physical activity level, smoking, and alcohol consumption. Further adjustment was made for body mass index (BMI) and percentage of fat mass. Earlier age at menarche was associated with slightly increased odds of higher BMI and abdominal fat percentage; of note is the positive correlation with lower body composition indices including hip and calf circumferences/skinfolds. Additionally, earlier age at menarche was associated with higher scores in the negative body image scales, namely overweight preoccupation and self-classified weight, whereas lower risks were found for higher scores in the positive body image scales, namely appearance evaluation and body area satisfaction scales. These findings remained significant after correcting for body fat percentage. The present results showed positive associations for earlier age at menarche with gross indices of obesity with the associations mainly confined to distribution of body fat in the lower part of the body, whereas an increased risk of negative body image was also found. Future research could refine our understanding of the biological and psychological mechanisms underlying these associations.

Development and validation of two anthropometric models estimating abdominal fat percentage in Greek adult women and men.

BACKGROUND AND AIMS: Abdominal obesity is associated with adverse health implications. However, the assessment of abdominal adiposity is either indirect, like in the case of waist circumference measurement, or difficult in daily clinical practice, like in the case of using reference methods such as computerized tomography, magnetic resonance imaging, etc. The aim of the current study was to develop and validate, using DXA as reference method, two easy and simple to use protocols, that estimate abdominal fat mass percentage (%AFM) in Greek females and males respectively, based on simple anthropometric measurements. METHODS: Circumferences and skinfolds were obtained from 709 Caucasian adults (437 women and 272 men) in order to develop and validate the two equations. The validation and the reliability of the equations were examined with Bland-Altman analysis and Intraclass Correlation Coefficient (ICC). RESULTS: The equations were: for females, %AFM = -121,368 - (17,322 × Height(m)) + (76,452 × log Abdominal Circumference(cm)) + (18,341 × log Suprailiac Skinfold(mm)) + (8802 × log Abdominal Skinfold(mm)), for males, %AFM = -174,117 - (15,247 × Height(m))+ (104,503 × log Abdominal Circumference(cm)) + (9907 × log Suprailiac Skinfold(mm)) + (7971 × log Abdominal Skinfold(mm)). The equations had no significant bias (0,203% and 0,406%, respectively), acceptable limits of agreement (±9.358% and ±8.780%, respectively) and high reliability (0,940 and 0,957, respectively). CONCLUSION: Both equations were found to be valid and reliable for Greek population. Therefore, the utilization of these equations for abdominal fat assessment could be an alternative of labor-intensive, expensive and time-consuming reference methods.

Development and validation of two equations based on anthropometry, estimating body fat for the Greek adult population.

OBJECTIVE: To validate anthropometric equations in the current literature predicting body fat percentage (%BF) in the Greek population, to develop and validate two anthropometric equations estimating %BF, and to compare them with the retrieved equations. METHODS: Anthropometric data from 642 Greek adults were incorporated. Dual-energy X-ray absorptiometry was used as reference method. The comparison with other equations was made using Bland-Altman analysis, intraclass correlation coefficient, and Lin's concordance correlation coefficient. RESULTS: Nine of the thirty-one retrieved equations had no statistically significant bias. However, all of them had wide limits of agreement (±8.3 to ±16%BF). The equations accrued were: BF% = -0.615-10.948 × sex + 0.321 × waist circumference + 0.502 × hips circumference-0.39 × forearm circumference - 19.768 × height (m) and BF% = -27.787-5.515 × sex-8.419 × height + 0.145 × waist circumference + 0.270 × hips circumference + 7.509 × log of thigh skinfold + 20.090 × log of sum of skinfolds (bicep + tricep + suprailiac + subscapular)-0.445 × forearm circumference. Bland-Altman's reliability analysis showed no significant bias of -0.058 and -0.148%BF and limits of agreement ±8.100 and ±6.056%BF; the intraclass correlation coefficient was 0.955 and 0.976; and Lin's concordance correlation coefficient was 0.914 and 0.951, respectively. CONCLUSIONS: Literature equations performed moderately on this study's population. Therefore, two equations were designed and validated. The first one was simple and easily applicable, with measures obtained from a measuring tape, and the second one more complicated yet more accurate and reliable. Both were found to be reliable for the assessment of body composition in the Greek population.

The career aspirations of adolescents with eating disorders: an exploratory study and suggested links to adolescent self-concept development.

The health effects of eating disorders (EDs) in adolescence have been widely studied, but their impact on present adolescent psychosocial adjustment and development have been overseen. This study aimed to investigate the association between EDs and career aspirations in middle adolescence. The participants were 147 adolescents diagnosed with EDs. Participants reported on their future career aspirations, and these were coded according to the International Standard Classification of Education of 1997. Of the participants, 83 adolescents were followed up longitudinally, and their aspirations were reassessed and compared for stability across the two assessments. Moreover, participants' career aspirations were compared to those of healthy (non-ED) best-friend controls. Health-related and social-behavioral science careers were chosen significantly more by adolescents with an ED as compared to their non-ED counterparts. For adolescents with an ED, career choices were consistent across reassessments. These findings suggest that adolescents with an ED gravitate toward careers associated with their pathology, namely, both facets of their mind-body pathology. This finding may indicate restricted identity development for adolescents with an ED. Suggestions for treatments protocols to include identity exploration are discussed.