Table 1.
Characteristics of the included studies.
| Study | Location | COVID-19 | Patient included | Setting | |
|---|---|---|---|---|---|
| During (N) | Prior (N) | ||||
| Dżygało, 2020 (17) | Poland | 34 | 52 | ≤18 years | Single center |
| Kamrath, 2020 (10) | Germany | 532 | 954 | ≤18 years | Multicenter |
| Rabbone, 2020 (18) | Italy | 160 | 208 | <15 years | Multicenter |
| Alaqeel, 2021 (32) | Saudi Arabia | 106 | 154 | 1–14 years | Multicenter |
| Boboc, 2021 (11) | Romania | 147 | 312 | <18 years | Single center |
| Bogale, 2021 (24) | USA | 42 | 370 | ≤18 years | Single center |
| Danne, 2021 (25) | Worldwide | 25543 | 31258 | ≤21 years | Multicenter |
| Dilek, 2021 (12) | Turkey | 74 | 46 | <18 years | Single center |
| Hawkes, 2021 (26) | USA, Europe | 73 | 92 | <18 years | Single center |
| Ho, 2021 (13) | Canada | 107 | 114 | <18 years | Multicenter |
| Jacob, 2021 (14) | Israel | 150 | 154 | ≤18 years | Multicenter |
| Lawrence, 2021 (15) | Australia | 11 | 42 | <18 years | Single center |
| McGlacken, 2021 (16) | UK | 17 | 30 | <18 years | Multicenter |
| Salmi, 2021 (27) | Finland | 84 | 231 | ≤15 years | Multicenter |
| Zubkiewicz-Kucharska, 2021 (28) | Poland | 30 | 1961 | <18 years | Multicenter |
| Al‐Abdulrazzaq, 2021 (29) | Kuwait | 324 | 303 | ≤12 years | Multicenter |
| Goldman, 2021 (30) | Israel | 146 | 364 | <18 years | Multicenter |
| Kostopoulou, 2021 (31) | Greece | 21 | 17 | <18 years | Multicenter |
| Mameli, 2021 (32) | Italy | 201 | 502 | <18 years | Multicenter |
| Mi Seon Lee, 2021 (33) | Korea | 10 | 10 | <19 years | Single center |