Volume for acute ischemic stroke (AIS), acute myocardial infarction (AMI), intravenous thrombolysis (IVT), mechanical thrombectomy (MT), and percutaneous coronary intervention (PCI) during the covid-19 period and precovid-19 period
| Outcome | Precovid-19 period | Covid-19 period | Percentage volume change (95% CI) |
| Overall* | |||
| AIS | 134 768 | 116 452 | −13.59 (−13.77 to −13.41) |
| MT | 9343 | 9711 | 3.94 (3.55 to 4.36) |
| IVT | 16 202 | 14 6683 | −9.47 (−9.99 to −9.02) |
| AMI | 146 800 | 121 551 | −17.20 (−17.39 to −17.01) |
| PCI | 184 336 | 151 364 | −17.89 (−18.06 to −17.71) |
| PCI+AMI | 88 935 | 76 168 | −14.36 (−14.59 to −14.12) |
| First wave† | |||
| AIS | 34 053 | 26 779 | −21.36 (−21.80 to −20.92) |
| MT: | |||
| Overall | 2249 | 2262‡ | 0.58 (0.32 to 1.00) |
| March | 743 | 837 | 12.65 (10.39 to 15.30) |
| April | 728 | 687 | −5.63 (−7.63 to −4.12) |
| May | 778 | 738 | −5.14 (−7.00 to −3.47) |
| IVT | 3957 | 3466 | −12.91 (−13.99 to −11.90) |
| AMI | 37 632 | 28 458 | −24.38 (−24.81 to −23.94) |
| PCI | 47 978 | 33 699 | −29.76 (−30.17 to −29.35) |
| PCI+AMI | 22 690 | 18 182 | −19.87 (−20.39 to 19.35) |
| Second wave§ | |||
| AIS | 33 970 | 31 025 | −8.67 (−8.97 to −8.37) |
| MT | 2211 | 2601 | 17.64 (16.08 to 19.30) |
| IVT | 4068 | 3917 | −3.71 (−4.34 to −3.17) |
| AMI | 36 047 | 31 989 | −11.26 (−11.59 to −10.93) |
| PCI | 46 102 | 40 980 | −11.11 (−11.40 to −10.82) |
| PCI+AMI | 22 059 | 20 168 | −8.57 (−8.95 to −8.21) |
| Third wave¶ | |||
| AIS | 66 745 | 58 648 | −12.13 (−12.38 to −11.88) |
| MT | 4883 | 4848 | −0.72 (−1.00 to −0.51) |
| IVT | 8177 | 7305 | −10.66 (−11.35 to −10.01) |
| AMI | 73 121 | 61 104 | −16.43 (−16.70 to −16.17) |
| PCI | 90 256 | 76 685 | −15.04 (−15.27 to −14.80) |
| PCI+AMI | 44 186 | 37 818 | −14.41 (−14.74 to −14.09) |
The average volume of PCI in this table is higher than the average volume of AMI because PCI procedures might be associated with coronary artery disease treatment (besides AMI).
CI=confidence interval. AIS=acute ischemic stroke; AMI=acute myocardial infarction; IVT=intravenous thrombectomy; MT=mechanical thrombectomy; PCI=percutaneous coronary intervention.
*Covid-19 period of March 2020-February 2021 v precovid-19 period of March 2019-February 2020. †MT volume reduced by 26% reduction (95% CI −12.54% to −10.09%) when comparing the first three months of the pandemic (March-May 2020) with the immediately preceding three months (December 2019-February 2020). ‡Covid-19 period of March-May 2020 v precovid-19 period of March-May 2019. §Covid-19 period of June-August 2020 v precovid-19 period of June-August 2019. ¶Covid-19 period of September 2020-February 2021 v precovid-19 period of September 2019-February 2020