From: Comparison of SDSG and CARDS classifications for L5/S1 lumbar degenerative spondylolisthesis: an independent inter- and intra-observer agreement study
The first assessment
The second assessment
Agreement among all 5 observers
58 (49.6%)
61 (52.1%)
Agreement among at least 3 observers
101 (86.3%)
103 (88.0%)