Show me your face and I will tell you your height, weight and body mass index

International audienceBody height, weight, as well as the associated and composite body mass index (BMI) are human attributes of pertinence due to their use in a number of applications including surveillance, re-identification, image retrieval systems, as well as healthcare. Previous work on automated estimation of height, weight and BMI has predominantly focused on 2D and 3D full-body images and videos. Little attention has been given to the use of face for estimating such traits. Motivated by the above, we here explore the possibility of estimating height, weight and BMI from single-shot facial images by proposing a regression method based on the 50-layers ResNet-architecture. In addition, we present a novel dataset consisting of 1026 subjects and show results, which suggest that facial images contain discriminatory information pertaining to height, weight and BMI, comparable to that of body-images and videos. Finally, we perform a gender-based analysis of the prediction of height, weight and BMI

ACCULTURATION AND POST-IMMIGRATION CHANGES IN OBESITY, PHYSICAL ACTIVITY, AND NUTRITION: COMPARING HISPANICS AND ASIANS IN THE WATERLOO REGION, ONTARIO, CANADA.

OBJECTIVES: The acculturation hypothesis speculates that as new immigrants get exposed to more obesogenic environments, they progressively acquire the unhealthy lifestyles of the host society, and their obesity risk gradually increases since time of arrival. However, the consistency of the presumed acculturation effect across immigrant groups and gender, and the reasons behind individual changes in lifestyle behaviors remain unclear. Thus, this study investigated the acculturation hypothesis in the Canadian context by comparing two foreign groups, Hispanics and East/Southeast Asians, which present contrasting post-settlement obesity patterns and behavioral trends. Methods: A 41-item questionnaire (including open-ended questions) was administered with 100 first-generation immigrants in the K-W Region to gather information on weight-relatedmeasures, acculturation levels, psychological stress, lifestyle behaviors, and perceived causes of changes in diet and physical activity. A logistic regression analysis was performed to estimate the likelihood of being overweight-obese, while interview transcripts were analyzed to identify response themes and explore causal relationships. RESULTS: Hispanics exhibited considerably higher body mass index levels and larger weight gains, and a nearly nine times higher overweight risk than East/Southeast Asians. Overweight risk was also higher for males and less-educated immigrants. Data collected shows that weight gains were larger for newcomers with high average psychological stress scores, and 38% of Hispanic participants mentioned either stress or depression as causes for their weight gains. The acculturation analysis revealed that East/Southeast Asians were significantly less integrated into Canadian society and more likely to maintain their traditional diets, while both groups reportedperceived-increased levels of recreational physical activity, which contradicts the belief of a linear uniform adoption of unhealthy lifestyle behaviors. DISCUSSION: Results support the notion that the impact of duration of residence does vary by ethnicity and gender. Future prevention efforts should focus on the foreign groups most likely to develop obesity, and pay particular attention to less-educated immigrants, who may be more likely to acquire unhealthy habits after settlement. Results also highlight the emergence of acculturative stress as a significant obesity-risk factor, and support the implementation of obesity preventive efforts that help immigrants manage post-settlement-related feelings of anxiety and depression through the inclusion of social integration strategies. In an increasingly diverse and multiethnic Canada, we expect the dissemination of the research findings to help recent and long-term immigrants to become more aware of obesity-relatedissues, and thus facilitate the adoption of healthier lifestyles after settlement in Canada

Face-to-BMI: Using Computer Vision to Infer Body Mass Index on Social Media

A person's weight status can have profound implications on their life, ranging from mental health, to longevity, to financial income. At the societal level, "fat shaming" and other forms of "sizeism" are a growing concern, while increasing obesity rates are linked to ever raising healthcare costs. For these reasons, researchers from a variety of backgrounds are interested in studying obesity from all angles. To obtain data, traditionally, a person would have to accurately self-report their body-mass index (BMI) or would have to see a doctor to have it measured. In this paper, we show how computer vision can be used to infer a person's BMI from social media images. We hope that our tool, which we release, helps to advance the study of social aspects related to body weight.Comment: This is a preprint of a short paper accepted at ICWSM'17. Please cite that version instea

Help in Overweight/Obesity Prevention Effort (HOPE) Study – A Study to Identify Resiliency Factors to Childhood Obesity and Comparison Between Body Mass Index and Figure Rating Scales

Obesity results from a complex interaction between diet, physical activity, and the environment. The purposes of this study were to identify behaviors associated with resilience to childhood obesity, and to compare the sensitivity of the Figure Rating Scales (FRS) in reflecting Body Mass Index (BMI). Fifty health professionals in nutrition and 35 low-income, parent-and-child pairs completed the study. Children aged 6-11, perceived as “normal-weight” by their parents, were recruited. Five children had a measured BMI above the 85th percentile. Using a picture-sort method, each participant responded to a series of questions about 13 childhood obesity-related messages. Results included comparison between health professionals, parents, and children about 1) familiarity toward each message, 2) frequency in following the recommendation, 3) perception of ease for others to follow, and 4) perception of effectiveness to help prevent childhood obesity. Health professionals and parents had similar familiarity regarding all 13 messages. However, in terms of practicality, health professionals and parents differed significantly in eight messages that they reported “always taught/followed,” seven messages that they “sometimes taught/followed,” and two messages that they “seldom or never taught/followed.” In most messages, children’s observation about what the family followed differed from what parents reported following. In terms of ease for others to follow “Watch portion sizes” and “Tell children to eat all of the meal before getting dessert,” health professionals and parental perception differed significantly. In terms of effectiveness in childhood obesity prevention, health professionals and parents agreed on 12 of 13 messages. Health professionals did not find message “Tell children to eat all of the meal before getting dessert” to be effective in preventing childhood obesity, whereas parents did. FRS and measured BMI were significantly correlated among health professionals (r=0.75), parents (r=0.72), and children (r=0.53 for children ages 8-11, r=0.64 when a mother selected a silhouette for her child). For different subgroups, parent-and-child silhouette selection was closely correlated (r= 0.84). However, correlation between child’s BMI percentile and silhouette was nonsignificant in most subgroups (r= 0.47). In conclusion, FRS was effective among adults and older children (aged ≥8) in reflecting BMI but not among younger children (aged 6-7)

Effectiveness and Feasibility of In-office versus Smartphone Text-delivered Nutrition Education in the College Setting: A Mixed-methods Pilot Study

Often, being away from home for the first time, coupled with limited knowledge regarding healthy eating behaviors, leads to poor food choices and an increased risk of obesity among college-aged young adults. These college students are prone to high-calorie diets and limited physical activity, putting them at risk for obesity, a physiologically, psychologically, and financially costly epidemic in the United States. College students use their cellular phones over eight and a half hours a day and cell phones are their primary means of information consumption outside of the classroom, suggesting that the phones would be a useful tool to provide nutrition education to this at-risk population. This mixed-methods randomized-controlled trial took place over eight weeks, between 9/15/15 and 12/2/15. The primary aims of this study were to assess the effectiveness and feasibility between an educational nutrition intervention delivered via smartphone texts and a traditional in-office setting for 18-22-year-old, overweight college students at the Sonoma State University Student Health Center. Using simple randomization, participants were assigned to one of two groups: text, or in-office. Participants in the in-office group received one-on-one nutrition counseling framed within the social cognitive theory by a registered nurse at the study onset, week two, and week four. Participants in the text group received the same information, broken up into weekly text messages with links to websites, YouTube, and explanations of content. Participant characteristics, including weight, height, and health behaviors (hours of sleep a night, number of fruits and vegetables per day), were assessed at the study onset (T1) and again at week two (T2), week four (T3), and week eight (T4). All participants were invited to take part in an in-depth, qualitative, face-to-face interview at the end of the study (T4). Nine participants completed both the trial and interviews. Two-thirds (66.7%, n=6) were in the text group, 66.7% (n=6) were female, 33.3% (n=3) were minorities, 66.7% lived on- campus, and 44.4% (n=4) took part in the university’s on-campus meal plan. No statistically significant differences were noted in participant characteristics, or health behaviors between the two groups throughout the study. Although no statistical significance was noted between the two groups with regard to weight change, the text group’s mean weight decreased from 188.25(sd=25.03) pounds to 184.58(sd=24.67) pounds while the in-office group’s mean weight increased from 254.00(sd=90.15) to 257.00(sd=94.14) pounds. Weight loss in the text group should be further evaluated as it may hold clinical significance for effectiveness of the intervention. Through qualitative interviews exploring participants’ experiences, four major themes emerged. All participants in the text group (n=6) stated that they felt there was a need for their method of education, they felt their method was effective, they would recommend their method, and their health behaviors changed positively. For the in-office group, all participants (n=3) said there was a need for their method of education, 67% (n=2) said it was effective, all would recommend it, and 67% stated that they changed their behaviors. Both the quantitative and qualitative findings of this study hold clinical significance as to the effectiveness and feasibility of text messages as a means of providing nutrition education in the college setting. Future research with larger sample sizes and a longer-term study are recommended for more statistical power and to determine the long-term benefits of these methods of nutrition education

iCook 4-H: Report of Accelerometer Derived Physical Activity in 9-10 Year Old Children from Baseline, Post, and Follow-up

To examine the relationship between baseline, post, and follow-up accelerometer derived physical activity (PA) in 9-10 year old children participating in iCook 4-H, a 16-week, 5- state, randomized control family centered childhood obesity prevention program. This family focus intervention was designed to promote PA through lifestyle modifications. Between group differences in minutes-per-day and intensity of PA were determined on accelerometer compliant participants. All subjects wore an accelerometer (Actigraph GT3X+) for 7 days at baseline, post, and follow-up intervention assessment. Mean daily minutes of accelerometer derived sedentary time (ST) and PA including light (LPA), moderate (MPA), vigorous (VPA) and moderate-to-vigorous (MVPA) were evaluated during waking hours (7am-9pm). A multivariate test, Wilks’ Lambda, was used to determine the between group differences of PA from baseline, post, and follow-up. Statistical significance was set at p ≤ 0.05. There were no significant differences between groups due to the intervention at any intensity category of PA (mean min/day±SD; p-value). Although there was not a significant increase in any category of physical activity due to the lifestyle intervention, iCook 4-H was able to encourage participants to maintain current activity levels

Street slang and schizophrenia

We report the case of a 26 year old streetwise young postman who presented with a six month history of reduced occupational and social function, low mood, and lack of motivation. He complained of feeling less sociable and less interested in his friends and of being clumsy and finding it harder to think. He was otherwise fit and healthy, with no physical abnormalities, neurological signs, or objective cognitive impairments. There was no history of a recent stressor that might have precipitated his symptoms. He was referred to a specialist service for patients in the prodromal phase of psychotic illness for further assessment after he had seen his general practitioner and the local community mental health team. The differential diagnosis at this stage was depression, the prodrome of schizophrenia, or no formal clinical disorder. His premorbid occupational and social function had been good. There was no history of abnormal . social, language, and motor development and he left school with two A levels. After three years of service at the post office he had been promoted to a supervisory role. He had a good relationship with his family and had six or so good friends. There has been a number of previous heterosexual relationships, although none in the past year. Aside from smoking cannabis on two occasions when he was 19, there was no history of illicit substance use. Detailed and repeated assessment of his mental state found a normal affect, no delusions, hallucinations, or catatonia, and no cognitive dysfunction. His speech, however, was peppered with what seemed (to his middle class and older psychiatrist) to be an unusual use of words, although he said they were street slang (table).Go It was thus unclear whether he was displaying subtle signs of formal thought disorder (manifest as disorganised speech, including the use of unusual words or phrases, and neologisms) or using a "street" argot. This was a crucial diagnostic distinction as thought disorder is a feature of psychotic illnesses and can indicate a diagnosis of schizophrenia. We sought to verify his explanations using an online dictionary of slang (urbandictionary.com). To our surprise, many of the words he used were listed and the definitions accorded with those he gave (see table). We further investigated whether his speech showed evidence of thought disorder by examining recordings of his speech as he described a series of ambiguous pictures from the thematic apperception test, a procedure that elicits thought disordered speech. His speech was transcribed and rated with the thought and language index, a standardised scale for assessing thought disorder. Slang used in a linguistically appropriate way is not scored as abnormal on this scale. His score was 5.25, primarily reflecting a mild loosening of associations. For example, he described a picture of a boat on a lake thus: "There’s a boat and a tree. There seems to be a reflection. There are no beds, and I wonder why there are no beds. There’s a breeze going through the branches of the tree." His score was outside the normal range (mean for normal controls 0.88, SD 1.15) and indicates subtle thought disorder, equivalent to that evident in remitted patients with schizophrenia (mean in remitted patients 3.89, SD 2.56) but lower than that in patients with formal thought disorder (mean 27.4, SD 8.3). Over the following year his social and occupational functioning deteriorated further, and he developed frank formal thought disorder as well as grandiose and persecutory delusions to the extent that he met DSM-IV criteria for schizophrenia. His speech was assessed as before, and the thought and language index score had increased to 11.75. This mainly reflected abnormalities on items comprising "positive" thought disorder, particularly the use of neologisms such as "chronocolising" and non-sequiturs. To our knowledge this is the first case report to describe difficulties in distinguishing "street" argots from formal thought disorder. It is perhaps not surprising that slang can complicate the assessment of disorganised speech as psychotic illnesses usually develop in young adults, whereas the assessing clinician is often from an older generation (and different sociocultural background) less familiar with contemporary urban slang. Online resources offer a means of distinguishing street argot from neologisms or a peculiar use of words, and linguistic rating scales may be a useful adjunct to clinical assessment when thought disorder is subtle. Differentiating thought disorder from slang can be especially difficult in the context of "prodromal" signs of psychosis, when speech abnormalities, if present, are usually subtle. Nevertheless, accurate speech assessment is important as subtle thought disorder can, as in this case, predate the subsequent onset of schizophrenia, and early detection and treatment of psychosis might be associated with a better long term clinical outcome

A phenomenological inquiry into children\u27s experiences and choices related to health and disease prevention

In this phenomenological study, 10 children who were diagnosed with insulin resistance and child overweight were interviewed. These interviews focused on how the children described their first experience as they learned about their risk factors for Type II diabetes and what prevention strategies they utilized. Each child interviewed, indicated that he or she experienced positive clinical outcomes, such as weight loss, weight maintenance, lower insulin levels, or decreased lipid profiles, all physiological markers for reducing risk factors for Type II diabetes. Children illustrated through narratives how they changed lifestyle habits, primarily in food selection and exercise. These changes were coping strategies that they utilized to lose weight and decrease insulin levels. Children spoke about the how changes in body composition also improved their self-confidence and self-esteem. The themes that emerged through the interviews included (a) positive lifestyle changes (b) social support and family (c) supportive friendships (d) psychosocial environment and (e) understanding self and developing resilience. The perspectives from each child have implications for future educational programming and initiatives regarding child overweight and disease and for providers who perform individual counseling

Distortion in Body Schema: The Influence of Body Fat and Mass on Perceptions of Personal Size

Obesity has been linked with a myriad of negative outcomes for both physical and mental health including feeding and eating disorders and cognitive impairments that affect perception of body size. Understanding the cognitive mechanisms and physiological factors that contribute to perception of body size may help us to comprehend how obesity impacts the construction and development of one’s mental body representations. Previous research by Scarpina, Castelnuovo, and Molinari (2014) suggests that, compared to those with a normal Body Mass Index, individuals with a BMI greater than 30 (obese) not only inaccurately estimate tactile and mental distances on their own bodies, they also significantly overestimate these distances. While BMI has been shown to be useful in predicting obesity, it fails to measure adiposity, or body fat. This proposed research project seeks to extend upon this past work by examining the independent effects of adiposity and high BMI on body size perception. I hypothesize that, compared to individuals with 3