The ODI remains a valid and vigorous measure and has been a worthwhile outcome measure .
The behavior of the instrument is incompletely understood , particularly in sensitivity to real change .
The Oswestry Disability Index ( ODI ) has become one of the principal condition-specific outcome measures used in the management of spinal disorders .
To review the versions of this instrument , document methods by which it has been vali date d , collate data from scores found in normal and back pain population s , provide curves for power calculations in studies using the ODI , and maintain the ODI as a gold st and ard outcome measure .
It has now been 20 years since its original publication .
Can psychological traits predict the outcome of lumbar disc surgery when anamnestic and physiological risk factors are controlled for? Results of a prospective cohort study.
In a prospect i ve study 122 patients with herniated lumbar disc pre-operatively completed psychological question naires .  Surgical outcome was evaluated 12 months post-operatively mainly by a composite clinical overall score ( COS ) , and by its separate elements . Anxiety ( HAD-A scale ) and psychosomatic symptoms ( MSPQ ) had predictive value : fewer symptoms favoured a satisfactory overall outcome , and vice versa . The HAD-A Scale had a predictive power of poor ( ppp ) and satisfactory ( pps ) outcome of 28 and 81 % , respectively . Correspondingly , for the MSPQ , the ppp and pps were 42 and 85 % . Anamnestic and biological variables ( including fibrinolytic variables : ECLT and PAI-1 ) predicted 20 % of the outcome . By adding all psychological variables the prediction increased only to 24 % , but the HAD-A Scale and the MSPQ were still significant . The results suggest that in order to further improve prediction of outcome , future studies should combine biological variables sensitive to the mental state of the patient , with psychometric assessment
The ODI remains a valid and vigorous measure and has been a worthwhile outcome measure .
The behavior of the instrument is incompletely understood , particularly in sensitivity to real change .
The Oswestry Disability Index ( ODI ) has become one of the principal condition-specific outcome measures used in the management of spinal disorders .
To review the versions of this instrument , document methods by which it has been vali date d , collate data from scores found in normal and back pain population s , provide curves for power calculations in studies using the ODI , and maintain the ODI as a gold st and ard outcome measure .
It has now been 20 years since its original publication .