Example of pre-existing data used to derive target variables (diet history)
The table below shows an example of pre-existing data used to derive target variables (diet history).
Table adapted from the Measurement Toolkit [145]
| Fish items in the original cohort | Harmonised items | |||
|---|---|---|---|---|
| Fish types | Frequency and quantity | Target variable | Harmonised categorisation of fish | Harmonised frequency and quantity |
| Total fish | g/d | Total fish | Total fish (sum of all available variables) – variables are mutually exclusive | Source data already in g/d |
| Cod; Baltic herring with bones; Baltic herring; Salmon; Salmon salted; Baltic herring salted with bones; Herring slated; Smoked Baltic herring with bones; Sardine; Smoked redfish; Perch; Pike; Flounder; Bream; Vendace with bones; Fresh frozen saithe; Whitefish; Fish average; Fish in soup, average; Roe; Stockfish; Vendace, salted with bones; Smoked vendace with bones; Smoked lamprey; Smoked whitefish; Smoked fish average; Tuna; Shrimp | g/d | Lean fish | Cod; Stockfish; Fresh frozen saithe; Perch; Pike; Flounder; Fish, average; Fish in soup, average | Source data already in g/d |
| Fatty fish | Baltic herring with bones; Baltic herring; Salmon; Salmon salted; Baltic herring salted with bones; Herring slated; Smoked Baltic herring with bones; Sardine; Smoked redfish; Whitefish; Vendace, salted with bones; Smoked vendace with bone; Vendace, with bones; Smoked fish average | Source data already in g/d | ||
| Salted/ smoked/ dried | Salmon salted; Baltic herring salted with bones; Herring salted; Smoked Baltic herring with bone; Smoked redfish; Vendace, salted with bones; Smoked vendace with bone; Smoked lamprey; Smoked whitefish; Smoked fish average: mean of four species; Baltic herring smoked; Vendace smoked; Whitefish smoked; Bream smoked | Source data already in g/d | ||
| Seafood other than fish | Shrimps | Source data already in g/d |