upf_categorization
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| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
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upf_categorization [2022/10/31 12:48] laura [Table] |
upf_categorization [2022/11/23 10:53] laura [Calculation of UPF categorization] |
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| Per category three types of variables have been created: | Per category three types of variables have been created: | ||
| * **Classification variable:** which adds up the intake of all food items that belong to the specific category | * **Classification variable:** which adds up the intake of all food items that belong to the specific category | ||
| - | * **Weight percentage variable:** which indicates how much of the total food intake belongs to the specific category | + | * **Intake (nova) weight ratio variable:** which indicates the weight proportion (% grams) of a specific category in the total diet of a day |
| - | * **Weight per 1000kcal variable:** which presents the specific category per 1000 kcal | + | * **Intake (nova) energy ratio variable:** which which indicates the energy ratio (grams/1000kcal) of a specific category in the total diet of a day |
| === Remarks from the UMCG researchers === | === Remarks from the UMCG researchers === | ||
| - | - The current categorization doesn't specifically handle the Betrouwbaarheid of energy intake (provided in the [[ffq_sum_scores|Food Frequency Questionnaire Sum scores]]). This could be a decision for other researchers using the UPF classification data. | + | - The current categorization doesn't specifically handle the reliability of energy intake (provided in the [[ffq_sum_scores|Food Frequency Questionnaire Sum scores]]). This could be a decision for other researchers using the UPF classification data. To make this easier, the reliability variable from the [[ffq_sum_scores|FFQ sum scores]] has been added as variable. |
| - According to the NOVA classification, some alcohol products should also be characterized as ultra-processed food. However, we did not do this because alcohol may have separate health effects. Therefore, we analyze alcohol intake always as a separate covariate. This is also practiced by other papers from other cohorts. | - According to the NOVA classification, some alcohol products should also be characterized as ultra-processed food. However, we did not do this because alcohol may have separate health effects. Therefore, we analyze alcohol intake always as a separate covariate. This is also practiced by other papers from other cohorts. | ||
upf_categorization.txt · Last modified: 2023/02/01 16:21 by flip
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