aSAH admissions overall and monthly volumes per continent before and during the COVID-19 pandemic
| Overall volume | Monthly volume* | ||||||||
| N | n1 | n2 | Change | P value | N | Immediately before | During COVID-19 | P value | |
| % (95% CI) | Adjusted mean (SE) | ||||||||
| Overall | 165 | 6912 | 6471 | −6.4 (−7.0 to −5.8) | 0.0001 | 172 | 3.84 (0.75) | 3.62 (0.74) | 0.030 |
| Europe | 59 | 2056 | 1944 | −5.4 (−6.5 to −4.6) | 0.077 | 62 | 2.90 (0.33) | 2.74 (0.36) | 0.290 |
| North America | 48 | 1856 | 1849 | −0.38 (−0.78 to −0.18) | 0.908 | 48 | 3.22 (0.51) | 3.21 (0.46) | 0.908 |
| Asia | 45 | 2340 | 2178 | −6.9 (−8.0 to −6.0) | 0.016 | 48 | 4.28 (0.81) | 4.03 (0.72) | 0.270 |
| South America | 8 | 435 | 291 | −33.1 (−37.7 to −28.8) | <0.0001 | 9 | 4.84 (2.09) | 3.28 (1.36) | 0.121 |
| Africa | 4 | 146 | 146 | 0.0 (0 to 2.6) | 1.0 | 4 | 3.04 (0.23) | 3.04 (0.23) | 1.0 |
| Oceania | 1 | 79 | 63 | −20.3 (−30.4 to −12.9) | 0.180 | 1 | – | – | – |
*The monthly volume analysis for each continent is adjusted for the date of peak COVID-19 volume for each country and the start date of the second wave. The overall monthly volume analysis is also adjusted for the continent.
.aSAH, aneurysmal subarachnoid haemorrhage; n1, number of admissions during 12 months before the COVID-19 pandemic; n2, number of admissions during 12 months of COVID-19 pandemic; n, number of hospitals; SAH, subarachnoid haemorrhage.