RESUMO
BACKGROUND: Diabetes prevention trials require large samples and community-based recruitment, which can be protracted and expensive. We analysed the cost-effectiveness of recruitment strategies used in a randomised placebo-controlled supplement trial in adults with prediabetes and overweight or obesity conducted in Sydney, Australia. METHODS: Recruitment strategies included advertising through local radio stations and newspapers, television news coverage, online advertising and editorials, advertising in and referral from primary care settings, university- and hospital-based advertising, and attending or hosting local events. For each strategy, the number of expressions of interest, screenings booked, and randomised participants were collated. The percentage contribution from each strategy, overall cost, and cost per participant were calculated. RESULTS: Of 4498 expressions of interest, 551 (12%) were eligible for onsite screening and 401 (9%) were randomised. Recruitment costs totalled AU$218,501, averaging AU$545 per participant. The recruitment strategy was recorded for 49% who expressed interest in the trial, and for 75% randomised into the trial. From these data, advertising on local radio stations was the most cost-effective strategy, contributing 46% of participants at AU$286 per participant, then advertising in and referral from primary care settings (57 participants [19%], AU$1438 per participant). The least cost-effective strategy was television news coverage, which was not targeted to the Sydney-based audience, contributing only six participants (AU$10,000 per participant). CONCLUSION: Radio advertising and recruitment through healthcare were the most effective recruitment strategies in this trial. Recruitment strategies should be location-specific and appropriate for the target population, prioritising low-effort high-yield strategies. Trial investigators should seek opportunities for free advertising.
Assuntos
Análise de Custo-Efetividade , Diabetes Mellitus , Adulto , Humanos , Seleção de Pacientes , Projetos de Pesquisa , Austrália , Análise Custo-BenefícioRESUMO
Many studies which describe the relationship between obesity and economic preference rely on healthy, clinically-irrelevant populations. Instead, we study economic decision-making of a clinically-relevant population of 299 people with obesity who participated in a 6-months Randomized Controlled Trial in two Sydney-based hospitals to prevent diabetes onset. To elicit preferences, we use incentive-compatible experimental tasks that participants completed during their medical screening examination. In this population, we find that participants are risk averse, show no evidence of present bias, and have impatience levels comparable to healthy samples described in the international literature. Variations in present bias and impatience are not significantly associated with variations in markers of obesity. We find however a statistically significant negative association between risk tolerance and markers of obesity for women. Importantly, impatience moderates the link between risk tolerance and obesity, a finding which we are able to replicate in nationally-representative survey data. We discuss explanations for why our findings deviate markedly from the literature for this understudied but highly policy-relevant population. One explanation is that our specific population consists of forward-looking, well-educated individuals, who are willing to participate in an intensive health intervention. Hence, other factors may be at play for why these individuals live with obesity.
Assuntos
Obesidade , Feminino , Humanos , Programas de Rastreamento , Obesidade/epidemiologia , Inquéritos e QuestionáriosRESUMO
Males are under-represented in weight loss clinical trials, usually comprising fewer than one-quarter of participants. Our study aimed to investigate people's motivations for participating in weight loss trials and determine any relationship with gender. Eighty individuals from an existing registry for weight loss trials were contacted, of whom 24 (9 males, 15 females) agreed to participate in a 20-min semi-structured interview around their expectations and motivations for volunteering. Interviews were audio-recorded and transcribed in Zoom. A transcript of each interview was uploaded into NVivo for preliminary thematic analysis. Improved health was a common motivation for pursuing weight loss in all subjects regardless of gender. Male recruitment to weight loss trials was often influenced by advice from a healthcare professional to lose weight for the prevention of obesity-related comorbidities, whereas family and aesthetic expectations (e.g., clothes and fashion) were key elements of female participation. Identification of gender differences in motivations for volunteering in weight loss trials will help improve tailoring of recruitment strategies and interventions to enhance male participation in the future.
Assuntos
Motivação , Redução de Peso , Humanos , Masculino , Feminino , Pesquisa Qualitativa , Obesidade/terapiaRESUMO
OBJECTIVES: In this work, we present an exploratory within-trial analysis of the changing prevalence of prediabetes in response to nutrition and lifestyle counselling provided as part of a randomized placebo-controlled supplement trial with follow-up. We aimed to identify factors associated with changing glycemia status. METHODS: Participants (n=401) in this clinical trial were adults with a body mass index (BMI) of ≥25 kg/m2 and prediabetes (defined by the American Diabetes Association as a fasting plasma glucose [FPG] of 5.6 to 6.9 mmol/L or a glycated hemoglobin [A1C] of 5.7% to 6.4%) within 6 months before trial entry. The trial consisted of a 6-month randomized intervention with 2 dietary supplements and/or placebo. At the same time, all participants received nutrition and lifestyle counselling. This was followed by a 6-month follow-up. Glycemia status was assessed at baseline and at 6 and 12 months. RESULTS: At baseline, 226 participants (56%) met a threshold for prediabetes, including 167 (42%) with elevated FPG and 155 (39%) with elevated A1C. After the 6-month intervention, the prevalence of prediabetes decreased to 46%, driven by a reduction in prevalence of elevated FPG to 29%. The prevalence of prediabetes then increased to 51% after follow-up. Risk of prediabetes was associated with older age (odds ratio [OR], 1.05; p<0.01), BMI (OR, 1.06; p<0.05), and male sex (OR, 1.81; p=0.01). Participants who reverted to normoglycemia had greater weight loss and lower baseline glycemia. CONCLUSIONS: Glycemia status can fluctuate over time and improvements can be gained from lifestyle interventions, with certain factors associated with a higher likelihood of reverting to normoglycemia.
Assuntos
Estado Pré-Diabético , Adulto , Humanos , Masculino , Estado Pré-Diabético/epidemiologia , Estado Pré-Diabético/terapia , Hemoglobinas Glicadas , Seguimentos , Glicemia , Suplementos Nutricionais , Estilo de Vida , AconselhamentoRESUMO
Gut microbiome is of major interest due to its close relationship to health and disease. Bacteria usually vary in gene content, leading to functional variations within species, so resolution higher than species-level methods is needed for ecological and clinical relevance. We design a protocol to identify strains in selected species with high discrimination and in high numbers by amplicon sequencing of the flagellin gene. We apply the protocol to fecal samples from a human diet trial, targeting Escherichia coli. Across the 119 samples from 16 individuals, there are 1,532 amplicon sequence variants (ASVs), but only 32 ASVs are dominant in one or more fecal samples, despite frequent dominant strain turnover. Major strains in an intestine are found to be commonly accompanied by a large number of satellite cells, and many are identified as potential extraintestinal pathogens. The protocol could be used to track epidemics or investigate the intra- or inter-host diversity of pathogens.
Assuntos
Escherichia coli/metabolismo , Microbioma Gastrointestinal/genética , Transcriptoma/genética , Adulto , DNA Bacteriano/genética , Escherichia coli/genética , Proteínas de Escherichia coli/metabolismo , Fezes/microbiologia , Feminino , Flagelina/genética , Flagelina/metabolismo , Microbioma Gastrointestinal/fisiologia , Expressão Gênica/genética , Variação Genética/genética , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Humanos , Intestinos , Masculino , Microbiota/genética , Pessoa de Meia-Idade , Filogenia , RNA Ribossômico 16S/genética , Análise de Sequência de DNA/métodosRESUMO
BACKGROUND: Endovascular thrombectomy (EVT) is efficacious for appropriately selected patients with large vessel occlusions (LVO) up to 24 hours from symptom onset. There is limited information on outcomes of nonagenarians, selected with computed tomography perfusion (CTP) imaging. METHODS: We retrospectively analyzed data from a large academic hospital between December 2017 and October 2019. Patients receiving EVT for anterior circulation LVO were stratified into nonagenarian (≥90 years) and younger (<90 years) groups. We performed propensity score matching on 18 covariates. In the matched cohort we compared: primary outcome of inpatient mortality and secondary outcomes of successful reperfusion (TICI ≥2B), symptomatic intracranial hemorrhage (sICH), and functional independence. Subgroup analysis compared CTP predicted core volumes in nonagenarians with outcomes. RESULTS: Overall, 214 consecutive patients (26 nonagenarians, 188 younger) underwent EVT. Nonagenarians were aged 92.8±2.9 years and younger patients were 74.5±13.5 years. Mortality rate was significantly greater in nonagenarians compared with younger patients (43.5% vs 10.4%, OR 9.33, 95% CI 2.88 to 47.97, P<0.0001) and a greater proportion of nonagenarians developed sICH (13.0% vs 3.0%, OR 6.00, 95% CI 1.34 to 55.20, P=0.02). There were no significant differences for successful reperfusion (P=1.00) or functional independence (P=0.75). Nonagenarians selected with smaller ischemic core volumes had decreased mortality rates (P=0.045). CONCLUSIONS: Nonagenarians were noted to have greater mortality and sICH rates following EVT compared with matched younger patients, which may be ameliorated by selecting patients with smaller CTP core volumes. Nonagenarians undergoing EVT had similar rates of successful reperfusion and functional independence compared with the younger cohort.
Assuntos
Isquemia Encefálica , Procedimentos Endovasculares , Acidente Vascular Cerebral , Idoso de 80 Anos ou mais , Humanos , Isquemia Encefálica/diagnóstico por imagem , Isquemia Encefálica/cirurgia , Estudos de Coortes , Procedimentos Endovasculares/métodos , Hemorragias Intracranianas , Nonagenários , Imagem de Perfusão , Estudos Retrospectivos , Acidente Vascular Cerebral/diagnóstico por imagem , Acidente Vascular Cerebral/cirurgia , Trombectomia/métodos , Tomografia Computadorizada por Raios X , Resultado do TratamentoRESUMO
BACKGROUND/OBJECTIVES: A systematic review with meta-analysis was conducted to synthesise evidence on the efficacy of dietary supplements containing isolated organic compounds for weight loss. SUBJECTS/METHODS: Four electronic databases (Medline, Embase, Web of Science, Cinahl) were searched until December 2019. Sixty-seven randomised placebo-controlled trials of dietary supplements containing isolated organic compounds for weight loss were included. Meta-analyses were conducted for chitosan, glucomannan, conjugated linoleic acid and fructans, comparing mean weight difference post-intervention between participants receiving the dietary supplement or placebo. RESULTS: Statistically significant weight differences compared to placebo were observed for chitosan (-1.84 kg; 95% confidence interval [CI] -2.79, -0.88; p < 0.01), glucomannan (-1.27 kg; 95%CI -2.45, -0.09; p = 0.04), and conjugated linoleic acid (-1.08 kg; 95%CI -1.61, -0.55; p < 0.01). None met our threshold for clinical significance (≥2.5 kg). There was no statistically significant effect on weight for fructans compared to placebo (p = 0.24). For dietary supplements with an inadequate number of trials for meta-analysis, a statistically and borderline clinically significant weight difference compared to placebo was found for modified cellulose, manno-oligosaccharides (in males), blood orange juice extract, and three multiple-ingredient dietary supplements. These were only reported in one trial of each. Thus, more evidence is needed before recommending them for weight loss. CONCLUSIONS: While some dietary supplements containing isolated organic compounds warrant further investigation to determine efficacy and safety, there is currently insufficient evidence to recommend any of these dietary supplements for weight loss.
Assuntos
Suplementos Nutricionais , Redução de Peso/efeitos dos fármacos , Quitosana/farmacologia , Frutanos/farmacologia , Humanos , Ácidos Linoleicos Conjugados/farmacologia , Mananas/farmacologia , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do TratamentoRESUMO
With the increasing prevalence of overweight and obesity worldwide, there is a reciprocal increase in the global economic burden and ill-health from obesity-related chronic diseases. Primary healthcare services have a role to play in ensuring early detection of weight issues and in directing patients towards evidence-based care to slow this progression. Research shows that many people with obesity are motivated to lose weight and want their clinician to initiate a conversation about weight management and treatment options. However, this conversation rarely occurs and there is a significant delay in treatment, resulting in an increased burden on the individual, healthcare system and society. In this paper, the components and rationale for the clinical assessment of adult patients with overweight or obesity, including anthropometric measurements and pathology tests, are described. Recommendations to ascertain the potential factors influencing the development of obesity in the patient, such as lifestyle factors (diet and physical activity) and mental health, are also provided. The potential sequelae of obesity that may be present and the necessary assessments for diagnosis are also addressed. These assessments are vital to ensure the patient is referred to the appropriate allied health services and/or specialists.
Assuntos
Obesidade , Sobrepeso , Adulto , Dieta , Exercício Físico , Humanos , Estilo de Vida , Obesidade/complicações , Obesidade/diagnóstico , Obesidade/terapia , Sobrepeso/complicações , Sobrepeso/terapiaRESUMO
Importance: Effective strategies for preventing type 2 diabetes are needed. Many people turn to complementary medicines, but there is little well-conducted scientific evidence to support their use. Objective: To assess the efficacy of α-cyclodextrin for cholesterol control and that of hydrolyzed ginseng for glycemic control in people with prediabetes and overweight or obesity. Design, Setting, and Participants: This 6-month double-blind, placebo-controlled, randomized clinical trial, with a 2 × 2 factorial design, was conducted between July 2015 and October 2018 at 2 locations in Sydney, Australia. Eligible participants were aged 18 years or older, had a body mass index (weight in kilograms divided by height in meters squared) of 25 or higher, and had prediabetes within 6 months of study entry according to the American Diabetes Association guidelines. Data analysis was performed from May to August 2019. Interventions: Participants were randomized to 1 of 4 groups to take active or placebo versions of each supplement (α-cyclodextrin plus hydrolyzed ginseng, α-cyclodextrin plus placebo, placebo plus hydrolyzed ginseng, or placebo plus placebo) for 6 months. All participants received dietetic advice for weight loss. Main Outcomes and Measures: The primary outcomes were the differences in total cholesterol and fasting plasma glucose between groups after 6 months. The primary analysis used the intention-to-treat principle. Multiple predetermined subsample analyses were conducted. Results: A total of 401 participants were eligible for the study (248 women [62%]; mean [SD] age, 53.5 [10.2] years; mean [SD] body mass index, 34.6 [6.2]). One hundred one patients were randomized to receive α-cyclodextrin plus hydrolyzed ginseng, 99 were randomized to receive α-cyclodextrin plus placebo, 101 were randomized to receive placebo plus hydrolyzed ginseng, and 100 were randomized to receive placebo plus placebo. For 200 participants taking α-cyclodextrin compared with 201 participants taking placebo, there was no difference in total cholesterol after 6 months (-1.5 mg/dL; 95% CI, -6.6 to 3.5 mg/dL; P = .51). For 202 participants taking hydrolyzed ginseng compared with 199 participants taking placebo, there was no difference in fasting plasma glucose after 6 months (0.0 mg/dL; 95% CI, -1.6 to 1.8 mg/dL; P = .95). Use of α-cyclodextrin was associated with constipation (16 participants vs 4 participants; P = .006) and cough (8 participants vs 1 participant; P = .02). Use of hydrolyzed ginseng was associated with rash and pruritus (13 participants vs 2 participants; P = .006). Only 37 of 401 participants (9.2%) experienced these adverse events. Conclusions and Relevance: Although they are safe for use, there was no benefit found for either α-cyclodextrin for cholesterol control or hydrolyzed ginseng for glycemic control in people with prediabetes and overweight or obesity. Trial Registration: Australian New Zealand Clinical Trials Registry Identifier: ACTRN12614001302640.
Assuntos
Glicemia/efeitos dos fármacos , HDL-Colesterol/efeitos dos fármacos , LDL-Colesterol/efeitos dos fármacos , Panax , Extratos Vegetais/farmacologia , alfa-Ciclodextrinas/farmacologia , Adulto , Terapias Complementares , Diabetes Mellitus Tipo 2/prevenção & controle , Método Duplo-Cego , Feminino , Controle Glicêmico/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Extratos Vegetais/uso terapêutico , Estado Pré-Diabético/metabolismo , alfa-Ciclodextrinas/uso terapêuticoRESUMO
BACKGROUND: Adherence to weight-loss medication is suboptimal, leading to poor health outcomes. Short message service (SMS) can potentially improve adherence. METHODS: A total of 3,994 participants with overweight or obesity in Australia receiving Saxenda® (liraglutide 3.0 mg) were enrolled from September 1, 2017, to February 28, 2018, through doctors, pharmacists, or websites and were randomly assigned to receive none, three, or five SMS per week. Participants were additionally offered a face-to-face consultation with a diabetes educator or a call from a dietitian. Medication adherence was measured as whether the total scripts claimed were at least as many as the total claims expected by March 31, 2018, and was modeled adjusting for age, sex, baseline BMI, residential region, enrolment channel, the total number of SMS, and additional patient support. RESULTS: Participants receiving five SMS (OR, 6.25; 95% CI: 4.28-9.12) had greater adherence than those receiving three SMS (OR, 3.67; 95% CI: 2.67-5.03) or zero SMS per week. The effectiveness of SMS on adherence decreased as participants received more SMS over time. Moreover, the odds of adhering to liraglutide were higher for participants enrolled with pharmacists compared with those enrolled with doctors (OR, 2.28; 95% CI: 1.82-2.86) and for participants who received a face-to-face consultation (OR, 3.10; 95% CI: 1.82-5.29) or a call (OR, 1.31; 95% CI: 1.02-1.68) compared with those who received no extra support. CONCLUSIONS: Integration of SMS into routine clinical practice should consider not only the frequency and content of reminders but also additional patient support to achieve higher and more sustained adherence to medication and health behavior changes.
Assuntos
Telefone Celular/instrumentação , Hipoglicemiantes/uso terapêutico , Liraglutida/uso terapêutico , Adesão à Medicação/estatística & dados numéricos , Telemedicina/métodos , Envio de Mensagens de Texto/normas , Adulto , Feminino , Comportamentos Relacionados com a Saúde , Humanos , Hipoglicemiantes/farmacologia , Liraglutida/farmacologia , Masculino , Pessoa de Meia-IdadeRESUMO
AIM: To update the available evidence on the efficacy and safety of complementary medicines to assist in weight loss by conducting a systematic review and meta-analysis of herbal medicines for weight loss. METHODS: Four electronic databases (Medline, Embase, CINAHL and Web of Science) were searched from inception until August 2018. A total of 54 randomized placebo-controlled trials of healthy overweight or obese adults were identified. Meta-analyses were conducted for herbal medicines with ≥4 studies available. Weight differences of ≥2.5 kg were considered clinically significant. RESULTS: As a single agent, only Phaseolus vulgaris resulted in a statistically significant weight loss compared to placebo, although this was not considered clinically significant. No effect was seen for Camellia sinensis or Garcinia cambogia. Statistically, but not clinically, significant differences were observed for combination preparations containing C. sinensis, P. vulgaris or Ephedra sinica. Of the herbal medicines trialled in ≤3 randomized controlled trials, statistically and clinically significant weight loss compared to placebo was reported for Irvingia gabonensis, Cissus quadrangularis, and Sphaeranthus indicus combined with Garcinia mangostana, among others, but these findings should be interpreted cautiously because of the small number of studies, generally poor methodological quality, and poor reporting of the herbal medicine interventions. Most herbal medicines appeared safe for consumption over the short duration of the studies (commonly ≤12 weeks). Some warrant further investigation to determine effect size, dosage and long-term safety. CONCLUSION: There is currently insufficient evidence to recommend any of the herbal medicines for weight loss included in the present review.
Assuntos
Fitoterapia , Redução de Peso , Adulto , Humanos , Obesidade/tratamento farmacológico , Sobrepeso/tratamento farmacológico , Ensaios Clínicos Controlados Aleatórios como AssuntoRESUMO
The prevalence of pre-diabetes and of type 2 diabetes mellitus is increasing. Preventing disease progression is important to improve outcomes. Natural products are becoming popular alternatives to pharmaceutical products for preventative health and treatment of disease; however, the evidence to support the use of natural alternatives for pre-diabetes and type 2 diabetes is lacking. Two such natural medicines include alpha-cyclodextrin (marketed as FBCx), a fibre derived from corn starch that has been found to bind triglycerides in the intestines to prevent its absorption, aiding weight maintenance and lipid control, and hydrolysed ginseng extract (marketed as GINST15), a formula containing high amounts of Compound K, a metabolite of ginsenosides thought to be an active ingredient contributing to the anti-hyperglycaemic effects of ginseng. This paper describes the rationale and design of a 12-month randomized controlled trial to investigate the metabolic effects of these two products in people with pre-diabetes and overweight or obesity. A total of 400 participants will be randomized to one of four groups (FBCx + GINST15, FBCx + placebo, placebo + GINST15, placebo + placebo) for 6 months, followed by 6 months of follow-up. Participants will also receive lifestyle advice for healthy eating and weight loss. Data collected during the trial will include weight, waist circumference, body composition and blood pressure. Blood samples will also be collected to measure lipid profile and glycaemia. If the products are found to improve lipid and glucose levels, it will provide evidence for their use in people with pre-diabetes to help reduce the risk of progression to type 2 diabetes.
Assuntos
Colesterol/metabolismo , Ginsenosídeos/administração & dosagem , Estado Pré-Diabético/tratamento farmacológico , alfa-Ciclodextrinas/administração & dosagem , Adulto , Glicemia/metabolismo , Peso Corporal/efeitos dos fármacos , Diabetes Mellitus Tipo 2/prevenção & controle , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Obesidade/dietoterapia , Obesidade/metabolismo , Sobrepeso/tratamento farmacológico , Sobrepeso/metabolismo , Estado Pré-Diabético/metabolismo , Triglicerídeos/metabolismoRESUMO
Different methods can be used in research to assess dietary intake, many of which are still paper-based. Written estimated food diaries are often utilized in clinical trials, despite being a burden for both study participants and researchers. This method requires participant literacy, it is time consuming, labor intensive, and can easily lead to under-reporting. With advancements in technology, there is a growing interest in electronic diaries that automate the dietary assessment process. These are focused on improving accuracy, reducing both time and cost and providing users with a visual and more enjoyable experience. The methodology presented here aimed to validate the 'Boden Food Plate', a novel web-based platform for self-recording of food and drink items, compared to a traditional estimated food diary. The application was also rated on a satisfaction scale by study participants using a paper-based questionnaire. Sixty-seven participants completed the dietary measures on both the three-day electronic and paper food diaries. For the analysis, only dietary data completed at both study time points (baseline and week six) was utilized. Despite small mean differences between dietary data collection methods, Bland Altman analysis showed fairly wide 95% limits of agreement between the electronic platform and the written estimated food diary and there were few cases which did not fall within the 95% confidence intervals. Overall, participants found the electronic food diary to be more fun than the paper method and as easy to use as hard copy diaries. The new platform has potential as a self-recording tool for the collection of dietary data, particularly when utilized in clinical trial settings. However, further validation studies are needed to improve the validity of this novel electronic dietary data collection tool.
Assuntos
Registros de Dieta , Dieta/métodos , Ingestão de Energia/fisiologia , Telemedicina/métodos , Adulto , Feminino , Humanos , Masculino , Reprodutibilidade dos Testes , Inquéritos e Questionários , Adulto JovemRESUMO
OBJECTIVE: This study aimed to assess population-level cost-effectiveness of the Weight Watchers (WW) program with doctor referral compared with standard care (SC) for Australian adults with overweight and obesity. METHODS: The target population was Australian adults ≥ 20 years old with BMI ≥ 27 kg/m2 , whose obesity status was subsequently modeled for 2015 to 2025. A microsimulation model (noncommunicable disease model [NCDMod]) was used to assess the incremental cost-effectiveness of WW compared with SC. A health system perspective was taken, and outcomes were measured by obesity cases averted in 2025, BMI units averted for 2015 to 2025, and quality-adjusted life years for 2015 to 2025. Univariate sensitivity testing was used to measure variations in the model parameters. RESULTS: The WW intervention resulted in 60,445 averted cases of obesity in 2025 (2,311 more cases than for SC), extra intervention costs of A$219 million, and cost savings within the health system of A$17,248 million (A$82 million more than for SC) for 2015 to 2025 compared with doing nothing. The modeled WW had an incremental cost-effectiveness ratio of A$35,195 in savings per case of obesity averted in 2025. WW remained dominant over SC for the different scenarios in the sensitivity analysis. CONCLUSIONS: The WW intervention represents good value for money. The WW intervention needs serious consideration in a national package of obesity health services.
Assuntos
Clínicos Gerais/estatística & dados numéricos , Obesidade , Padrões de Prática Médica , Encaminhamento e Consulta/estatística & dados numéricos , Programas de Redução de Peso/economia , Programas de Redução de Peso/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Austrália/epidemiologia , Peso Corporal , Análise Custo-Benefício , Feminino , Clínicos Gerais/economia , Humanos , Masculino , Pessoa de Meia-Idade , Obesidade/economia , Obesidade/epidemiologia , Obesidade/terapia , Avaliação de Resultados em Cuidados de Saúde , Sobrepeso/economia , Sobrepeso/epidemiologia , Sobrepeso/terapia , Padrões de Prática Médica/economia , Padrões de Prática Médica/estatística & dados numéricos , Anos de Vida Ajustados por Qualidade de Vida , Encaminhamento e Consulta/economia , Grupos de Autoajuda/economia , Grupos de Autoajuda/estatística & dados numéricos , Adulto JovemRESUMO
BACKGROUND: Relatively little is known about dietary changes and their relationships with weight change during behavioural weight loss interventions. In a secondary analysis of data from a multicentre RCT, we investigated whether greater improvements in diet would be achieved by overweight adults following a 12 month group-based commercial weight loss programme (CP) than those receiving standard care (SC) in primary practice, and if these dietary changes were associated with greater weight loss. METHODS: Adults with a BMI 27-35 kg/m2 and >1 risk factor for obesity-related disorders were recruited in study centres in Australia and the UK during 2007-2008. Dietary intake and body weight were measured at baseline, 6 and 12 months. Linear mixed effects models compared mean changes in dietary macronutrient intake, fibre density and energy density over time between groups, and their relationships with weight loss. RESULTS: The CP group demonstrated greater mean weight loss than the SC group at 6 months (3.3 kg, 95% CI: 2.2, 4.4) and 12 months (3.3 kg, 95% CI: 2.1, 4.5). Diet quality improved in both intervention groups at 6 and 12 months. However, the CP group (n = 228) achieved significantly greater mean reductions in energy intake (mean difference; 95% CI: - 503 kJ/d; - 913, - 93), dietary energy density (- 0.48 MJ/g; - 0.81, - 0.16), total fat (- 6.9 g/d; - 11.9, - 1.8), saturated fat (- 3.3 g/d; - 5.4, - 1.1), and significantly greater mean increases in fibre density (0.30 g/MJ; 0.15, 0.44) at 6 months than the SC group (n = 239). Similar differences persisted at 12 months and the CP group showed greater mean increases in protein density (0.65 g/MJ). In both groups, weight loss was associated with increased fibre density (0.68 kg per g/MJ, 95% CI: 0.08, 1.27) and protein density (0.26 kg per g/MJ, 95% CI: 0.10, 0.41). CONCLUSIONS: Following a group-based commercial program led to greater improvements in diet quality than standard care. Increases in dietary protein and fibre density were independently associated with weight loss in both behavioural weight loss interventions. Greater increases in protein and fibre density in the commercial program likely contributed to their greater weight loss. TRIAL REGISTRATION: ISRCTN: ISRCTN85485463 Registered 03/08/2007 Retrospectively Registered.
Assuntos
Sobrepeso/terapia , Atenção Primária à Saúde , Programas de Redução de Peso , Adulto , Austrália , Terapia Comportamental , Índice de Massa Corporal , Dieta Redutora , Fibras na Dieta/administração & dosagem , Proteínas Alimentares/administração & dosagem , Ingestão de Energia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Reino Unido , Redução de PesoRESUMO
Background: Some country guidelines recommend that people with type 2 diabetes (T2D) limit their consumption of eggs and cholesterol. Our previously published 3-mo weight-maintenance study showed that a high-egg (≥12 eggs/wk) diet compared with a low-egg diet (<2 eggs/wk) did not have adverse effects on cardiometabolic risk factors in adults with T2D. Objective: The current study follows the previously published 3-mo weight-maintenance study and assessed the effects of the high-egg compared with the low-egg diets as part of a 3-mo weight-loss period, followed by a 6-mo follow-up period for a total duration of 12 mo. Design: Participants with prediabetes or T2D (n = 128) were prescribed a 3-mo daily energy restriction of 2.1 MJ and a macronutrient-matched diet and instructed on specific types and quantities of foods to be consumed, with an emphasis on replacing saturated fats with monounsaturated and polyunsaturated fats. Participants were followed up at the 9- and 12-mo visits. Results: From 3 to 12 mo, the weight loss was similar (high-egg compared with low-egg diets: -3.1 ± 6.3 compared with -3.1 ± 5.2 kg; P = 0.48). There were no differences between groups in glycemia (plasma glucose, glycated hemoglobin, 1,5-anhydroglucitol), traditional serum lipids, markers of inflammation (high-sensitivity C-reactive protein, interleukin 6, soluble E-selectin), oxidative stress (F2-isoprostanes), or adiponectin from 3 to 12 mo or from 0 to 12 mo. Conclusions: People with prediabetes or T2D who consumed a 3-mo high-egg weight-loss diet with a 6-mo follow-up exhibited no adverse changes in cardiometabolic markers compared with those who consumed a low-egg weight-loss diet. A healthy diet based on population guidelines and including more eggs than currently recommended by some countries may be safely consumed. This trial is registered at http://www.anzctr.org.au/ as ACTRN12612001266853.
Assuntos
Doenças Cardiovasculares/dietoterapia , Diabetes Mellitus Tipo 2/dietoterapia , Dieta Redutora , Ovos , Redução de Peso , Idoso , Glicemia , Proteína C-Reativa/metabolismo , Doenças Cardiovasculares/prevenção & controle , F2-Isoprostanos/sangue , Feminino , Seguimentos , Cardiopatias/dietoterapia , Humanos , Interleucina-6/sangue , Interleucina-6/metabolismo , Lipídeos/sangue , Masculino , Pessoa de Meia-Idade , Obesidade/sangue , Obesidade/dietoterapia , Fatores de Risco , Selectinas/sangue , Resultado do TratamentoRESUMO
OBJECTIVE: This study aimed to determine whether the use of complementary medicine (CM) is associated with body satisfaction and weight management methods in Australian women. METHODS: Women aged 34-39 years from the Australian Longitudinal Study on Women's Health were surveyed regarding satisfaction with their body weight and shape, and the use of weight management methods. Associations with CM use were analysed using logistic regression modelling. RESULTS: Women using CM less likely wanted to lose weight; and were more likely to cut down on fats and/or sugars, use low glycaemic diets, diet books and 'other' methods (OR: 1.33-2.83) compared to CM non-users. Women using herbal medicine products 'sometimes' were more likely to use meal replacements/slimming products (OR: 1.50-1.67) compared to non-users. DISCUSSION: Australian women using CM are more likely to be satisfied with their body weight and shape, and to use a range of weight management approaches compared to CM non-users.