Ahlström [17] | Sweden | Mixed | Case–control study | 6 March to 27 May 2020 | 133 | 1981 | | 61 | 1465 | | 75 | 522 | 982 | 9 |
Almazeedi [41] | Kuwait | Hospital | Retrospective cohort study | 24 February to 20 April 2020 | 43 | 1096 | | 41 | 888 | 44 | 5 | 155 | 177 | 9 |
Arslan [46] | Turkey | Hospital | Retrospective cohort study | 18 March to 15 May 2020 | 58 | 767 | 51.99 | | 374 | 80 | 43 | 137 | 220 | 8 |
Ashinyo [47] | Ghana | Hospital | Retrospective cohort study | 23 March to 29 June 2020 | 24 | 307 | 37.9 | | 174 | | | 20 | 219 | 7 |
Aveyard [13] | Mexico | Hospital | Retrospective cohort study | 27 February to 21 June 2020 | 4942 | 178 306 | | 44.1 | 88 083 | | | | | 8 |
Baumer [12] | UK | Hospital | Prospective cohort study | 9 March to 7 May 2020 | 12 | 52 | 54.82 | | 29 | | | | | 8 |
Bergman [18] | Sweden | Mixed | Case–control study | To mid-September 2020 | 4493 | 68 575 | 46 | | 26 808 | | 2168 | 4897 | 16 416 | 9 |
Beurnier [48] | France | Hospital | Prospective cohort study | 15 March to 15 April 2020 | 37 | 112 | | 60 | 49 | | | 17 | 32 | 9 |
Calmes [49] | Belgium | Hospital | Retrospective cohort study | 18 March to 17 April 2020 | 57 | 596 | 58.75# | | 294 | | | | | 9 |
Castilla [19] | Spain | Mixed | Retrospective cohort study | July to December 2020 | 2330 | 35 387 | | 38.8 | 17 172 | 6119 | 1404 | 1893 | 4543 | 9 |
Chhiba [50] | USA | Hospital | Retrospective cohort study | 1 March to 15 April 2020 | 220 | 1526 | | 53.3# | 654 | 43 | | | | 9 |
Choi [20] | South Korea | Mixed | Retrospective cohort study | To 15 May 2020 | 218 | 7372 | | 44.5# | 3000 | | | | | 9 |
Dennis [30] | UK | Hospital | Retrospective cohort study | 1 March to 27 July 2020 | 1557 | 17 606 | 67 | | 10 560 | | 231 | 421 | | 9 |
Eggert [51] | USA | Hospital | Retrospective cohort study | 1 March to 30 September 2020 | 598 | 5596 | | 38.4 | 2635 | 123 | 88 | 609 | 1021 | 9 |
Emami [52] | Iran | Hospital | Retrospective cohort study | 20 February to 1 March 2020 | 25 | 1239 | 51.48 | | 692 | 27 | | 176 | | 7 |
Ferastraoaru [53] | USA | Hospital | Retrospective cohort study | 14 March to 27 April 2020 | 951 | 4558 | | 60.5 | | | | | | 9 |
Fong [54] | UK | Hospital | Retrospective cohort study | 1 March to 31 May 2020 | 102 | 617 | | 65 | | | | | | 9 |
Garcia-Pachon [14] | Spain | Community | Retrospective cohort study | 3 March to 12 April 2020 | 10 | 376 | | 54 | 192 | | | | | 8 |
Green [21] | Israel | Mixed | Retrospective cohort study | February to June 2020 | 153 | 2266 | 33.31 | | 1200 | 102 | | 200 | 276 | 9 |
Guan [55] | China | Hospital | Retrospective cohort study | December 2019 to 6 May 2020 | 244 | 39 420 | | 55.7 | 19 655 | | | | | 9 |
Gude-Sampedro [22] | Spain | Mixed | Retrospective cohort study | 6 March to 7 May 2020 | 288 | 10 454 | 58 | | 4172 | 258 | 180 | 619 | 1457 | 9 |
Gupta [29] | USA | Hospital | Retrospective cohort study | To 4 March 2020 | 30 | 529 | | 70 | 286 | 39 | 36 | 289 | 416 | 6 |
Hansen [23] | Denmark | Mixed | Retrospective cohort study | 1 February to 10 July 2020 | 354 | 5104 | | 54.6 | 2399 | | 432 | 598 | | 9 |
Ho [38] | USA | Hospital | Retrospective cohort study | 7 March to 7 June 2020 | 468 | 10 523 | 58.35 | | 5707 | | 286 | 1679 | 2662 | 9 |
Je [56] | Australia | Hospital | Retrospective cohort study | March to April 2020 | 22 | 197 | 45 | | 94 | | 4 | 8 | 28 | 7 |
Kim [57] | South Korea | Hospital | Case–control study | February to May 2020 | 66 | 2200 | 56.71 | | 785 | 92 | 30 | 378 | 645 | 9 |
Kipourou [58] | Kuwait | Hospital | Prospective cohort study | 24 February to 27 May 2020 | 235 | 3995 | | 40.4 | 2814 | 140 | 17 | 730 | 778 | 9 |
Lee [15] | South Korea | Community | Retrospective cohort study | January to 27 May 2020 | 686 | 7272 | | 45.3 | 2927 | | | 1041 | 1401 | 9 |
Lemus Calderon [59] | Spain | Hospital | Retrospective cohort study | To July 2020 | 577 | 6310 | 59 | | 2983 | 873 | | 1641 | 3239 | 9 |
Liao [60] | USA | Hospital | Retrospective cohort study | 11 March to 23 June 2020 | 41 | 113 | 50 | | 53 | 2 | 57 | 11 | 18 | 9 |
Lieberman-Cribbin [61] | USA | Hospital | Retrospective cohort study | 29 February to 24 April 2020 | 272 | 6245 | | 57 | 3060 | | | | | 8 |
Lombardi [62] | Italy | Hospital | Retrospective cohort study | 20 February to 20 April 2020 | 20 | 1043 | | 52.5# | 704 | | | | | 9 |
Louie [24] | Australia | Mixed | Case series | 19 March to 15 May 2020 | 10 | 99 | | 54 | 51 | | 2 | 8 | 14 | 8 |
Lovinsky-Desir [63] | USA | Mixed | Prospective cohort study | 11 February to 7 May 2020 | 163 | 1298 | | 52 | 762 | 55 | | | | 9 |
Martos-Benítez [25] | Mexico | Mixed | Retrospective cohort study | 1 January to 12 May 2020 | 1188 | 38 324 | 46.9 | | 22 362 | 3277 | 889 | 7168 | 8340 | 9 |
Mash [64] | South Africa | Hospital | Retrospective cohort study | March to June 2020 | 67 | 1376 | 46.3 | | 571 | 95 | 50 | 364 | 564 | 8 |
Mather [65] | USA | Hospital | Case–control study | February to November 2020 | 88 | 1045 | | 64.6 | 352 | | 18 | 221 | 307 | 8 |
Murillo-Zamora [66] | Mexico | Hospital | Retrospective cohort study | 4 March to 15 August 2020 | 1448 | 66 123 | | 52.4 | 40 124 | | 2619 | 21 840 | 26 728 | 9 |
Nystad [26] | Norway | Mixed | Retrospective cohort study | 1 March to 13 May 2020 | 515 | 7632 | | 33.22# | | | 161 | 468 | 977 | 7 |
Patone [27] | UK | Mixed | Retrospective cohort study | 1 November to 26 January 2021 | 29 792 | 198 420 | 37.7 | | 93 765 | 22 134 | 1873 | 10 347 | 19 636 | 9 |
Robinson [67] | USA | Hospital | Case–control study | 4 March to 2 July 2020 | 562 | 3248 | | 51 | 911 | 131 | | 321 | 107 | 8 |
Rosenthal [68] | USA | Hospital | Retrospective cohort study | March to May 2020 | 105 | 727 | 49.46 | | | | | 165 | 278 | 8 |
Salacup [69] | USA | Hospital | Retrospective cohort study | 1 March to 24 April 2020 | 18 | 242 | | 66 | 123 | | 30 | 118 | 180 | 8 |
Schönfeld [28] | Argentina | Mixed | Retrospective cohort study | 3 March to 2 October 2020 | 12 580 | 207 079 | | 41 | 103 487 | 4074 | 4405 | 20 058 | 39 833 | 9 |
Shah [70] | USA | Hospital | Retrospective cohort study | 3 February to 31 March 2020 | 4 | 33 | | 63 | 22 | 0 | 1 | 9 | 16 | 8 |
Tutiya [71] | Brazil | Hospital | Retrospective cohort study | 13 March to 7 June 2020 | 7 | 114 | | 32.4 | 0 | | | 12 | 13 | 7 |
Valverde-Monge [72] | Spain | Hospital | Retrospective cohort study | 31 January to 17 April 2020 | 113 | 2539 | | 62.66 | 1275 | 154 | 89 | 403 | 1054 | 9 |
Wang [40] | China | Hospital | Retrospective cohort study | 28 January to 25 February 2020 | 68 | 562 | | 47 | 265 | | | | | 8 |
Yang [37] | South Korea | Community | Retrospective cohort study | 1 January to 15 May 2020 | 725 | 7340 | 47.1 | | 2970 | | 350 | 951 | 1638 | 9 |
Yordanov [16] | France | Mixed | Prospective cohort study | March to August 2020 | 814 | 7320 | 43 | | 2301 | 790 | 87 | 402 | 978 | 6 |
Zhang [31] | China | Hospital | Retrospective cohort study | 29 December 2019 to 16 February 2020 | 1 | 290 | | 57 | 155 | 10 | 6 | 27 | 81 | 8 |