Comparison of SDSG and CARDS classifications for L5/S1 lumbar degenerative spondylolisthesis: an independent inter- and intra-observer agreement study

Table 8 Intra-observer reproducibility of CARDS classification

Observers^a	Cases in agreement between first and second assessment					Agreement (%)	K
Observers^a	Type A	Type B	Type C	Type D	Total	Agreement (%)	K
1	18	45	34	7	104	88.9	0.862
2	16	44	35	7	102	87.2	0.835
3	19	46	35	8	108	92.3	0.904
4	20	50	33	7	110	94.0	0.917
5	18	47	32	8	105	89.7	0.874
Overall	-	-	-	-	-	90.4	0.878

ISSN: 1749-799X