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a, b SF-McGill total index and number of pain describing words by patients with SLE as grouped by SLE-related pain at year 0 and year 7. a SF-McGill total index (0–45). b SF-McGill number of descriptive words (0–15). aWilcoxon matched pairs test, p value defines changes between inclusion (year 0) and follow-up (year 7), *statistically significant value
