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Table 2 Comparison of Intra-Class Correlation Coefficient (ICC) and 95% confidential interval for all the parameters between supine (CT-based DRR) and standing (original EOS)

From: Difference in whole spinal alignment between supine and standing positions in patients with adult spinal deformity using a new comparison method with slot-scanning three-dimensional X-ray imager and computed tomography through digital reconstructed radiography

CT ICC 95% CI EOS ICC 95% CI
Intra-rater reliability (two examiners, 24 subjects)
 T1-T12 TK 0.963 0.905 / 0.986 T1-T12 TK 0.980 0.955 / 0.991
 T4-T12 TK 0.967 0.926 / 0.985 T4-T12 TK 0.989 0.976 / 0.995
 L1-L5 LL 0.979 0.953 / 0.991 L1-L5 LL 0.986 0.968 / 0.994
 L1-S1 LL 0.992 0.981 / 0.996 L1-S1 LL 0.991 0.980 / 0.996
 PI 0.982 0.959 / 0.992 PI 0.981 0.956 / 0.992
 SS 0.990 0.976 / 0.995 SS 0.984 0.964 / 0.993
 PT 0.996 0.992 / 0.998 PT 0.998 0.996 / 0.999
 Cobb angle 0.989 0.972 / 0.996 Cobb angle 0.991 0.976 / 0.996
 Rotation 0.973 0.930 / 0.990 Rotation 0.955 0.887 / 0.983
 Average 0.981 0.955 / 0.992 average 0.984 0.962 / 0.993
Inter-rater reliability (two examiners, 24 subjects)
 T1-T12 TK 0.932 0.850 / 0.970 T1-T12 TK 0.988 0.972 / 0.995
 T4-T12 TK 0.971 0.935 / 0.987 T4-T12 TK 0.984 0.964 / 0.993
 L1-L5 LL 0.964 0.919 / 0.984 L1-L5 LL 0.989 0.974 / 0.995
 L1-S1 LL 0.986 0.963 / 0.994 L1-S1 LL 0.993 0.976 / 0.997
 PI 0.969 0.821 / 0.990 PI 0.974 0.940 / 0.988
 SS 0.964 0.466 / 0.991 SS 0.982 0.945 / 0.993
 PT 0.992 0.846 / 0.998 PT 0.997 0.917 / 0.999
 Cobb angle 0.992 0.928 / 0.998 Cobb angle 0.994 0.985 / 0.998
 Rotation 0.963 0.905 / 0.986 Rotation 0.974 0.931 / 0.990
 Average 0.970 0.848 / 0.989 average 0.986 0.956 / 0.994