| N with/without abscess | Event | Event free group | p Value | |
| Brain abscess | ||||
| RS presentation (%) (n (%)) | 28/190 | 5 (17.9) | 42 (22.1) | 0.81 |
| Sao2 (%) (median (Q1, Q3)) | 21/163 | 93.0 (86.5, 96) | 93.8 (89.0, 96.0) | 0.48 |
| R-L (%) (median (Q1, Q3)) | 20/111 | 9.3 (3.1, 22 ) | 9.2 (5.0, 19.7) | 0.46 |
| Single PAVMs* (%) (n (%)) | 27/185 | 7 (25.9) | 45 (24.3) | 0.82 |
| Largest fad (mm) (median (Q1, Q3)) | 24/164 | 5.5 (3.0, 6.5) | 5 (4.0, 6.5) | 0.97 |
| Small (fad ⩽3 mm) (%) (n (%)) | 28/190 | 21 (75.0) | 140 (73.7) | 0.99 |
| N with/without stroke | Event | Event free group | p Value | |
| Ischaemic stroke | ||||
| RS presentation (%) (n (%)) | 30/186 | 8 (26.7) | 39 (21) | 0.48 |
| Sao2 (%) (median (Q1, Q3)) | 25/157 | 93 (85, 96) | 94 (88.5, 96) | 0.3 |
| R-L (%) (median (Q1, Q3)) | 24/105 | 11.0 (7.1, 19.5) | 8.8 (4.7, 20.0) | 0.32 |
| Single PAVMs* (%) (n (%)) | 29/181 | 7 (24.1) | 44 (24.3) | 0.99 |
| Largest fad (mm) (median (Q1, Q3)) | 28/158 | 5.5 (4.0, 7.5) | 5 (3.0, 6.0) | 0.087 |
| Small (fad ⩽3 mm) (%) (n (%)) | 29/187 | 24 (82.8) | 137 (73.3) | 0.36 |
N, number of cases with/without event for which variable was measured.
*More common in non-HHT patients (p<0.0001, Fisher’s exact test two sided p value).
fad, feeding artery diameter; HHT, hereditary haemorrhagic telangiectasia; PAVM, pulmonary arteriovenous malformations; R-L, right-to-left; RS, respiratory symptoms; Sao2, arterial oxygen saturation.