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Table 3 Intra-rater measures reliability results

From: A method for quantitative measurement of lumbar intervertebral disc structures: an intra- and inter-rater agreement and reliability study

Measurement

n (slices)

ICC [95% CI]

Length - AIVH

258

0.91 [0.88, 0.93]

Length - PIVH

258

0.90 [0.88, 0.92]

Length - IVDL

258

0.99 [0.99, 1.00]

Length - ADML

258

0.95 [0.94, 0.96]

Length - PDML

258

0.94 [0.92, 0.95]

Length - ADSL

227

0.98 [0.98, 0.99]

 

n (participants)

 

Area – CAIH

24

0.99 [0.98, 1.00]

Area – CPIH

24

0.98 [0.96, 0.99]

Area - CIVD

24

1.00 [1.00, 1.00]

Area - CADM

24

0.97 [0.94, 0.99]

Area - CPDM

24

0.95 [0.89, 0.98]

Area - CDS

25

0.97 [0.93, 0.99]

Volume - VADM

24

0.95 [0.89, 0.98]

Volume - VPDM

24

0.95 [0.88, 0.98]

  1. Number of slices measured for length and participants measured for cross-sectional area and volume measurements, intraclass correlation coefficient (ICC), and accompanying 95% confidence intervals (CI). Due to absence of dural sac at certain otherwise measured slices, a lower number of slices were measured. Participants with unequal start- and end-slices were excluded from the analyses, leading to varying numbers of included participants.