Products

Tag Archives | tiered structure

How can I identify when and where my subjects ate their food?

The researcher can enter meal codes from 1 to 999. A typical way of using these codes is to set 1 to 9 as the first digit, 0 to 9 as the second digit and 0 to 9 as the third digit. For instance this could make 100 breakfast, 110 breakfast away, 111 breakfast at MacDonalds, etc… of course, any scheme is possible using these 3 digits.
The researcher can enter this data in a table of meal codes which are used to prompt data entry personnel and provide output in validation reports. This table is subject file specific. A meals table can thus be specific to each study.
Meal codes and descriptions appear in all meal detail reports. Meal codes are included in export files and can thus be used in spreadsheets and statistical packages.

Food Files

CANDAT uses as its Master file the Canadian Food file. This Master file is included with CANDAT. CANDAT can also accommodate a second or alternate Master food file (such as the USDA Handbook #8 file).

  1. Food code: The code structure used is identical to that used by the Canadian food file. An extra zero has been added to the end of the 6 digit code to allow the institute and user files to fold new food codes into the same code areas as that of the Master food file.
  2. Tier Structure: CANDAT has a three tiered food file structure. The first tier contains the Master food file. CANDAT does not allow direct changes to be made to this file. The next tier contains the Institute file. There is only one such file and CANDAT is installed with this file empty. The third tier contains the User food files. There can be any number of User food files though only one can be active at a time.
    The concept of the three tier system also allows an institution to define values for foods to be used in analysis by all its users. Values the institution may consider less accurate than desired in the Master food file can be entered and used from the Institute food file. The food information is copied completely from the Master file and stored in the Institute file where it can be changed, under password control, by the manager of the system.
    The same concept applies to the User food file in relation to both the Master food file and the Institute food file. When CANDAT needs food information it first looks to the User food file, then to the Institute file and finally, to the Master food file. Identical food codes are used at each tier so that finding the food has the effect of masking the level(s) above it.

University of Guelph

I have used Candat for many years for the analysis of 24 hour recall data, and for the development and subsequent analysis of food frequency questionnaires for two different studies. The range of analytic options provided by Candat, and the fact that it is based on the latest version of the Canadian Nutrient File, are key features.
Assistance with the development of FFQs and translation of responses into the format that can be analyzed with Candat is available on an as needed and timely basis. Response is usually within 24 hours. And, there is no problem asking for help.
I have used Candat for years because of GLI’s knowledge and continuous efforts to make the software ever more powerful.

Susan Evers PhD
Professor
Department of Family Relations and Applied Nutrition
University of Guelph
Guelph, Ontario, N1G 2W1

University of PEI

CANDAT is superior to other nutrient analysis programs because it is designed to accommodate the diverse needs of researchers. Being able to handle food recalls and records and food frequency questionnaires in the same program, to create user files of special food items not included in the CNF and to easily import files into statistical analysis packages makes it unique in Canada. Most of all, having a support person who has extensive experience with nutrition researchers makes CANDAT an easy choice for me.

I have been working with CANDAT since 1984, and have also tried a number of other nutrient analysis programs. I keep coming back to CANDAT for two reasons: the support with CANDAT is superb. I have emailed Gaetan and received a phone call within minutes. He “knows his stuff” and can pinpoint and resolve any problems or challenges quickly. The program he uses to take over the computer is amazing and very efficient.

Since he has worked with a number of academics in nutrition, he understands research and the special needs researchers have. My research group had a challenging task a few years ago which involved adapting an American Food Frequency questionnaire for Canadian use and adding data on dietary nitrates. This was a very complex and time consuming task, and Gaetan was an active participant in the research process. When we were under time pressures to complete the analysis, Gaetan committed time and was able to get us the data when we needed it. He goes beyond a technical role, and sometimes poses questions which I don’t think of, preventing problems before they happen.

Dr. Jennifer Taylor, Associate Professor & Chair
Department of Family & Nutritional Sciences
Dalton Hall 204
University of Prince Edward Island
550 University Ave, Charlottetown PEI C1A 4P3 (902)
566-0475 Fax (902) 628-4367

call: +1 (877) 977-2664 (toll free)