Probability of AA according to AAS | Pre-test probability of AA | Post-test probability of AA, positive test | Post-test probability of AA, negative test |
---|---|---|---|
US | |||
All patients, n = 497 | 177/497 (37%) | 86/104 (83%) | 91/393 (23%) |
High, n = 52 | 41/52 (75%) | 19/20 (95%) | 22/32 (69%) |
Intermediate, n = 258 | 122/258 (47%) | 59/65 (91%) | 63/193 (33%) |
Low, n = 187 | 17/187 (9%) | 8/19 (42%) | 9/168 (5.4%) |
CT | |||
All patients, n = 489 | 257/489 (53%) | 253/260 (97%) | 4/229 (1.8%) |
High, n = 114 | 90/114 (79%) | 90/91 (99%) | 0/23 (0%) |
Intermediate, n = 276 | 138/276 (50%) | 135/148 (91%) | 3/128 (2.3%) |
Low, n = 99 | 16/99 (16%) | 15/20 (75%) | 1/79 (1.3%) |