• Acceptability, usability and weight loss outcomes in a randomized cross-over study of commercially available portion size tools in an overweight South Asian community

      Ellahi, Basma; Aitken, Amanda; Dikmen, Derya; Erdogan, Bilge Seyhan; Makda, Munibah; Razaq, Rifat; University of Chester; Hacettepe University (MDPI, 2022-06-23)
      South Asian women living in the UK are particularly at high risk of obesity-related complications, such as type 2 diabetes and cardio-vascular disease. Exposure to large portion sizes is a risk factor for obesity. Specifically, designed tableware helps individuals to manage weight through controlling food portion sizes. Thirty-one (n=31) overweight or obese South Asian adult women participated in a randomised cross-over trial aimed to assess efficacy, acceptance and weight change for two guided/calibrated commercially available portion control tools (Utensil set and Crockery Set) used in free-living conditions. Data on acceptance, perceived changes in portion size, frequency, and meal type was collected using paper questionnaires and 3-day diet dairies. Scores describing acceptance, ease of use and perceived effectiveness were derived from five-point Likert scales from which binary indicators (high/low) were analysed for significance using multivariate variance analysis for repeated measurements. A reduction in BMI was observed at each point of measurement (p=0.007). For overall tool use, the crockery set scored higher in all areas of acceptance, ease of use, perceived efficacy for all comparisons. Self-selected portion sizes increased for salads and decreased for cooking oil and breakfast cereals with both tools. Further research to scale up and evaluate similar weight management interventions for this group are warranted.
    • Dietary assessment in minority ethnic groups: A systematic review of portion size estimation instruments relevant for the UK

      Almiron-Roig, Eva; Aitken, Amanda; Galloway, Catherine; Ellahi, Basma; MRC Elsie Widdowson Laboratory, Cambridge, UK. Centre for Nutrition Research, University of Navarra, Pamplona, Spain. Faculty of Health and Social Care, University of Chester, Chester, UK (Oxford University Press, 2016-03-14)
      Context: Dietary assessment in minority ethnic groups is critical for surveillance programmes and for implementing effective interventions. A major challenge is the accurate estimation of portion sizes for traditional foods/dishes. Objective: To systematically review published records up to 2014 describing a portion size estimation element (PSEE) applicable to dietary assessment of UK-residing ethnic minorities. Data sources, selection, extraction: Electronic databases, internet sites, and theses repositories were searched generating 5683 titles from which 57 eligible full-text records were reviewed. Data analysis: Forty-two publications aimed at minority ethnic groups (n=20) or autochthonous populations (n=22) were included. The most common PSEE (47%) were combination tools (e.g. food models and portion size lists); followed by portion size lists in questionnaires/guides (19%); image-based and volumetric tools (17% each). Only 17% PSEE had been validated against weighed data. Conclusions: When developing ethnic-specific dietary assessment tools it is important to consider customary portion sizes by sex and age; traditional household utensil usage and population literacy levels. Combining multiple PSEE may increase accuracy but such tools need validating.