The Pfirrmann classification of lumbar intervertebral disc degeneration: an independent inter- and intra-observer agreement assessment

[1] Pfirrmann CW(2001)Magnetic resonance classification of lumbar intervertebral disc degeneration Spine (Phila Pa 1976) 26 1873-1878

[2] Metzdorf A(2015)Correlation between biomechanical properties of the annulus fibrosus and magnetic resonance imaging (MRI) findings Eur Spine J 24 1909-1916

[3] Zanetti M(2014)In vivo quantification of lumbar disc degeneration: assessment of ADC value using a degenerative scoring system based on Pfirrmann framework Eur Spine J 24 679-685

[4] Hodler J(2015)Association between intervertebral disc degeneration and endplate perfusion studied by DCE-MRI Eur Spine J 24 1944-1950

[5] Boos N(2015)Intervertebral disc height loss demonstrates the threshold of major pathological changes during degeneration Eur Spine J 17 101-110

[6] Shan Z(1998)Sample size and optimal designs for reliability studies Stat Med 32 E708-E712

[7] Li S(2007)Modified Pfirrmann grading system for lumbar intervertebral disc degeneration Spine (Phila Pa 1976) 8 23-34

[8] Liu J(2012)Computing inter-rater reliability for observational data: an overview and tutorial Tutor Quant Methods Psychol 33 159-174

[9] Mamuti M(1977)The measurement of observer agreement for categorical data Biometrics 25 596-601

[10] Wang C(2016)The prevalence of degenerative or incidental findings in the lumbar spine of pediatric patients: a study using magnetic resonance imaging as a screening tool Eur Spine J 64 96-106

[1] Pfirrmann CW(2001)Magnetic resonance classification of lumbar intervertebral disc degeneration Spine (Phila Pa 1976) 26 1873-1878

[2] Metzdorf A(2015)Correlation between biomechanical properties of the annulus fibrosus and magnetic resonance imaging (MRI) findings Eur Spine J 24 1909-1916

[3] Zanetti M(2014)In vivo quantification of lumbar disc degeneration: assessment of ADC value using a degenerative scoring system based on Pfirrmann framework Eur Spine J 24 679-685

[4] Hodler J(2015)Association between intervertebral disc degeneration and endplate perfusion studied by DCE-MRI Eur Spine J 24 1944-1950

[5] Boos N(2015)Intervertebral disc height loss demonstrates the threshold of major pathological changes during degeneration Eur Spine J 17 101-110

[6] Shan Z(1998)Sample size and optimal designs for reliability studies Stat Med 32 E708-E712

[7] Li S(2007)Modified Pfirrmann grading system for lumbar intervertebral disc degeneration Spine (Phila Pa 1976) 8 23-34

[8] Liu J(2012)Computing inter-rater reliability for observational data: an overview and tutorial Tutor Quant Methods Psychol 33 159-174

[9] Mamuti M(1977)The measurement of observer agreement for categorical data Biometrics 25 596-601

[10] Wang C(2016)The prevalence of degenerative or incidental findings in the lumbar spine of pediatric patients: a study using magnetic resonance imaging as a screening tool Eur Spine J 64 96-106