Sentence examples for both supplements was assessed from inspiring English sources

Evaluation of participant satisfaction of both supplements was assessed using questionnaires.

Contribution of folate from food, fortified grain products, and supplements was assessed by validated semiquantitative food frequency questionnaire.

Use of nutrient supplements was assessed on each biennial questionnaire.

Dietary history including use of vitamin and mineral supplements was assessed using the 131-item semi-quantitative food-frequency questionnaire (FFQ) that has been described in detail elsewhere [ 23] and has been validated in a variety of populations [ 24– 28].

13 Smoking habits and use of dietary supplements were assessed by a research nurse.

Completed questionnaires were digitalised (Teleform software) and the data analysed by AL and CGP using SPSS, version 18. Descriptive statistics were generated and unadjusted associations with use of alternative treatments and natural medicines/dietary supplements were assessed by Chi, t-tests, or logistic regression analysis.

Dietary supplement is assessed using a self-administered dietary supplement questionnaire developed by the Division of Human Nutrition of Wageningen University, the Netherlands.

Compliance with the supplement is assessed through the collection of all unused supplements at the end of each week.

The relationship between ovarian cancer and the TAC indices and individual antioxidants (vitamin C, vitamin E, beta-carotene, lycopene, lutein, and selenium, from food sources, supplements, and food and supplements combined) was assessed by evaluating the indices as categorical variables.

Vitamin supplement use was assessed through self-report using vitamin bottle labels.

Medication and supplement use was assessed by a complete inventory of prescriptions and bottles brought to the interview.