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Since this resulted in a long and time-consuming questionnaire, the questionnaire was divided into four parts and called the **Flower Food Frequency Questionnaire**.\\ | Since this resulted in a long and time-consuming questionnaire, the questionnaire was divided into four parts and called the **Flower Food Frequency Questionnaire**.\\ | ||
The questionnaire consists of one basic questionnaire, assessed at [[1A|baseline]]: **the heart** of the flower. It covers energy and macronutrient intake and takes ~30 minutes to complete. The raw data from the heart FFQ were used to calculate [[FFQ sum scores|macronutrient sum scores]].\\ | The questionnaire consists of one basic questionnaire, assessed at [[1A|baseline]]: **the heart** of the flower. It covers energy and macronutrient intake and takes ~30 minutes to complete. The raw data from the heart FFQ were used to calculate [[FFQ sum scores|macronutrient sum scores]].\\ | ||
- | The other three shorter questionnaires, **the petals**, were only used in adults and cover the (micro)nutrients: | + | The other three shorter questionnaires, **the petals**, were only used in adults and cover the (micro)nutrients (See Figure 1): |
* FFQ1 (Petal 1) consists of 61 food items and is used to estimate the intake of vitamin B2, B6, B11, 12, calcium and soy. | * FFQ1 (Petal 1) consists of 61 food items and is used to estimate the intake of vitamin B2, B6, B11, 12, calcium and soy. | ||
* FFQ2 (Petal 2) contains 59 food items and is used to estimate the intake of different types of fatty acids and caffeine | * FFQ2 (Petal 2) contains 59 food items and is used to estimate the intake of different types of fatty acids and caffeine | ||
- | * FFQ3 (Petal 3) consists of 64 food items and is used to estimate the intake of vitamin A, C, E, and dietary fiber. See Figure 1. | + | * FFQ3 (Petal 3) consists of 64 food items and is used to estimate the intake of vitamin A, C, E, and dietary fiber. |
The Flower FFQ covers ≥96% of the absolute nutriënt intake and ≥93% of the between-person variability of each nutriënt as assessed in the Dutch National Food Consumption Survey from 1998. | The Flower FFQ covers ≥96% of the absolute nutriënt intake and ≥93% of the between-person variability of each nutriënt as assessed in the Dutch National Food Consumption Survey from 1998. |