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Mean (SD) ODI and RM scores for each of the Likert scale categories for disability, pain frequency and pain medication. The percentage value given under each category on the x-axis shows the proportion of patients in each category. RM scores are expressed as a percentage value, for direct comparison with the ODI scores (RM, 24 points=100%). The symbols indicate significant difference in the mean scores (* ODI, ‡ RM) between the two x-axis categories on either side of the symbol
