Introduction: issues in study planning and design. An assessment


approaches to dietary assessment methods and instruments have been developed
and applied to overcome some of the challenges and limitations of dietary
assessment. Particularly the growing prominence of the internet- and
communication technologies has offered new possibilities to address bias and
measurement errors inherent in all self-reported dietary intakes as well as
organizational and financial issues in study planning and design. An assessment
of the capability of these creative advancements to supplant, enhance or
supplement these usually utilized dietary appraisal techniques may, in this
manner, help to better evaluate their ease of use and conceivable ‘included
esteem’ in epidemiological examinations.

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List some available modern
technologies for dietary assessment and evaluate their validity in
epidemiological studies. Evaluation of the suitability of using new dietary assessment tools among Arabic countries and
spot the light on the areas for future development to improve existing tools.


Structured searches were performed in MEDLINE, Pub Med websites and Internet search engines (e.g.
Google Scholar). The following terms were used separately or in combination:
Food/nutrient/dietary intake, food consumption, assessment, technology, tools,
innovative, Mobile, Computer and web. The abstract of the study were identified
through different searches scanning. Related articles were retrieved and data were
extracted from articles.



The search was categorized according to the technology applied by choosing
one significant tool. Validation studies compared the new technology tool to reference
dietary instrument. In total, modern using of utilized personal digital
assistants (PDAs) coupled with a camera or mobile phone as a replacement for old
writing food records. Food frequency questionnaire (FFQ) and 24 hours dietary
recall (24-HDR) developed and applied as web based self assessment.


PDA technologies:

Personal digital assistant technologies are hand-held
computers which has modern networking features and using keyboard for input. PDA with a specific dietary software program can be used to record and monitor
daily self dietary intake. After received face
to face training, the participant is asked to record his/here dietary intake immediately
after consumption by selecting the food and beverage items from the menu. At
the same time, the amount that has been consumed is projected by portion size which
can be estimated with different aids like food photographs, picture from book
or house-hold measurement. In others, participants are instructed to quantify the
amounts of food serving in compare with traditional food models. Another variable assessment like
qualitative information assessment of dietary habits e.g. meal start time and
date, food facts with nutritional

information on buying items 1. PDA
technologies are shown in figure 1.

Figure 1: PDA technologies.



On 2005 2, one study was done to assess a three days of use PDA-based food program (DietMatePro) and compared this
method with 24-h recall data and
observed meal data. 39 adults from different ethnic backgrounds were
observed. The result shows that, no significant differences were found in
measuring the micronutrient intake & energy. Pearson correlations between PDA
and comparison measurements are summarizing in table1.