Table 5 Study design and study-level risk of bias, stratified by Abstrackr’s relevance predictions
From: Decoding semi-automated title-abstract screening: findings from a convenience sample of reviews
Study characteristic | N studies | Correctly predicted as relevant, n (%) | Incorrectly predicted as irrelevant, n (%) | P valuea |
|---|---|---|---|---|
Design | ||||
 Trial | 483 | 438 (91) | 45 (9) | 0.0006 |
 Observational | 214 | 169 (79) | 45 (21) | |
 Mixed methods | 2 | 2 (100) | 0 (0) | |
 Qualitative | 15 | 14 (93) | 1 (7) | |
 Review | 88 | 73 (83) | 15 (17) | |
Risk of bias | ||||
 Low | 120 | 96 (80) | 24 (20) | 0.039 |
 High or unclear | 500 | 438 (88) | 62 (12) | |