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

Table 7 Intra-observer reproducibility of SDSG classification

Observers^a	Cases in agreement between first and second assessment							Agreement (%)	K
Observers^a	Type 1	Type 2	Type 3	Type 4	Type 5	Type 6	Total	Agreement (%)	K
1	18	31	22	14	11	7	103	88.0	0.859
2	17	32	22	14	13	7	105	89.7	0.871
3	16	30	23	11	13	6	99	84.6	0.823
4	18	31	20	13	12	7	101	86.3	0.844
5	17	32	23	15	13	8	108	92.3	0.906
Overall	-	-	-	-	-	-	-	88.2	0.861

ISSN: 1749-799X