| Concept | Card/Conf | Id | 
                        
                           | 
                                 
                                    |  | DietAssessment |  | 0 … * Conditional | nfdhtfcov19-dataelement-103link | 
                        
                           |  | Diet assessment information collected in the [RESOURCE] | 
                        
                           |  | 
                                 
                                    | 
                                          
                                             | Card/Conf | Condition |  
                                             | 1 … * Mandatory | 1..*, if Resource.nutritionalData == "Yes" |  
                                             | 0 … 0 Not permitted | 0..0, if Resource.nutritionalData == "No" |  |  | 
                        
                           | 
                                 
                                    |  |   | instrument |  | 1 … 1 Mandatory | nfdhtfcov19-dataelement-101link | 
                        
                           |  | Dietary assessment instrument used | 
                        
                           | 
                                 
                                    |  |   | ffqItemsNumber |  | 0 … 1 Conditional | nfdhtfcov19-dataelement-104link | 
                        
                           |  | Number of items in FFQ | 
                        
                           |  | 
                                 
                                    | 
                                          
                                             | Card/Conf | Condition |  
                                             | 1 … 1 Mandatory | 1..1, if DietAssessment.instrument == "Food frequency questionnaire (FFQ)" |  
                                             | 0 … 0 Not permitted | 0..0, if DietAssessment.instrument != "Food frequency questionnaire (FFQ)" |  |  | 
                        
                           | 
                                 
                                    |  |   | mode |  | 1 … * Mandatory | nfdhtfcov19-dataelement-105link | 
                        
                           |  | Mode(s) used to apply the dietary assessment instrument | 
                        
                           | 
                                 
                                    |  |   | device |  | 1 … * Mandatory | nfdhtfcov19-dataelement-106link | 
                        
                           |  | Device(s) used to apply the dietary assessment instrument | 
                        
                           | 
                                 
                                    |  |   | portionSizeEstimation |  | 1 … * Mandatory | nfdhtfcov19-dataelement-107link | 
                        
                           |  | Portion size estimated by: | 
                        
                           | 
                                 
                                    |  |   | referencePeriodUnit |  | 1 … 1 Mandatory | nfdhtfcov19-dataelement-108link | 
                        
                           |  | Reference period unit | 
                        
                           | 
                                 
                                    |  |   | referencePeriodNumber |  | 1 … 1 Mandatory | nfdhtfcov19-dataelement-109link | 
                        
                           |  | Numerical value of reference period units | 
                        
                           | 
                                 
                                    |  |   | repeat |  | 1 … 1 Mandatory | nfdhtfcov19-dataelement-110link | 
                        
                           |  | Instrument applied repeatedly? | 
                        
                           | 
                                 
                                    |  |   | repeatFrequency |  | 0 … 1 Conditional | nfdhtfcov19-dataelement-111link | 
                        
                           |  | Frequency of instrument application | 
                        
                           |  | 
                                 
                                    | 
                                          
                                             | Card/Conf | Condition |  
                                             | 1 … 1 Mandatory | 1..1, if DietAssessment.repeat == "Yes" |  
                                             | 0 … 0 Not permitted | 0..0, if DietAssessment.repeat == "No" |  |  | 
                        
                           | 
                                 
                                    |  |   | validity |  | 1 … 1 Mandatory | nfdhtfcov19-dataelement-112link | 
                        
                           |  | Instrument validated? | 
                        
                           | 
                                 
                                    |  |   | validityReference |  | 0 … 1 Conditional | nfdhtfcov19-dataelement-113link | 
                        
                           |  | Reference describing the validation | 
                        
                           |  | 
                                 
                                    | 
                                          
                                             | Card/Conf | Condition |  
                                             | 1 … 1 Mandatory | 1..1, if DietAssessment.validity == "Yes" |  
                                             | 0 … 0 Not permitted | 0..0, if DietAssessment.validity == "No" |  |  | 
                        
                           | 
                                 
                                    |  |   | reliability |  | 1 … 1 Mandatory | nfdhtfcov19-dataelement-114link | 
                        
                           |  | Instrument described according to reliability? | 
                        
                           | 
                                 
                                    |  |   | reliabilityReference |  | 0 … 1 Conditional | nfdhtfcov19-dataelement-115link | 
                        
                           |  | Reference describing reliability measures | 
                        
                           |  | 
                                 
                                    | 
                                          
                                             | Card/Conf | Condition |  
                                             | 1 … 1 Mandatory | 1..1, if DietAssessment.reliability == "Yes" |  
                                             | 0 … 0 Not permitted | 0..0, if DietAssessment.reliability == "No" |  |  | 
                        
                           | 
                                 
                                    |  |   | dietarySupplements |  | 1 … 1 Mandatory | nfdhtfcov19-dataelement-116link | 
                        
                           |  | Dietary supplements inquired? |