Table 2.
Characteristics of national retrospective cohorts and status of data collection, as of 30 Nov. 2022.
| Country | Age | N° of | Start | End | Cohort size | ||
|---|---|---|---|---|---|---|---|
| (Y) | hospitals | accrual & follow-up | Accrual | Follow-up | Collected locally | Expected | |
| Belgium | 0–18 | 3 | 2004 | 2020 | 2020 | 2841 | 6000 |
| France | 0–16 | 15 | 2000 | 2020 | 2016 | 18 600 | 19 000 |
| Germany | 0–18 | 2 | 2004 | 2020 | 2020 | 4000 | |
| 0–18 | Insurance claims | 2004 | 2020 | 2020 | 20 000 | ||
| Italy | 0–18 | 2 | 2017 | 2021 | 2022 | 384 | 1000 |
| Norway | 0–18 | 1 | 1975 | 2022 | 2022 | 5400 | 6500 |
| Spain | 0–18 | 2 to 2 | 2005 | 2022 | 2021 | None | 5000 |
| UK | 0–22 | 6 | 1991 | 2020 | 2020 | 20 464 | 30 000 |
| 47 000 | 90 000 | ||||||
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