Survey of Cannabis Use in Patients With Chronic Inflammatory Arthritis

Patients will answer the following question: Are you currently using cannabis - Yes or No

Questionnaire CAST score. It includes 6 items with answer modes coded from 0 to 4. The total score obtained by summing these 6 items can therefore vary from 0 to 24. We define users without risk for a score of less than 3, users with low risk for a score greater than or equal to 3 and less than 7, and finally those with a risk of problematic use for a score greater than or equal to 7

Spondylitis ankylosing activity was assessed by Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) questionnaire.

Rheumatoid arthritis / psoriatic arthritis was assessed by Disease Activity Score including 28 joints (DAS 28). DAS 28 includes the 28 swollen joint count (28 SJC) + the 28 tender joint count (28 TJC) + patient global assessments of disease activity on a VAS, + ESR or CRP. [DAS (VS) = 0,56 x √TJC + 0,28 x √SJC + 0,7 x ln(VS) + 0,014 x VAS ; DAS (CRP) = 0,56 x √TJC + 0,28 x √SJC + 0,36 x ln(CRP + 1) + 0,014 x VAS + 0,96 ]. The scores according to EULAR criteria are: ≤2.6 for remission, >2.6 and ≤3.2 for low disease activity, >3.2 and ≤5.1 for moderate disease activity and >5.1 for high disease activity.

Functional disability was assessed by Health Assessment Questionnaire Disability Index (HAQ DI). HAQ-DI is an index that measures the impact of pathology on everyday activities such as dressing, eating, walking, etc.

The following note is allocated to each question: 0 = without any difficulty ; 1 = with some difficulty ; 2 = with great difficulty ; 3 = unable to do so

Anxiety and depression was assessed by Hospital Anxiety and Depression scale (HADs). 14 items scored from 0 to 3. Seven questions relate to anxiety (total A) and seven others to the depressive dimension (total D), allowing two scores to be obtained (maximum score of each score = 21). To detect anxious and depressive symptoms, the following interpretation can be proposed for each of the scores (A and D): - 7 or less: absence of symptoms - 8 to 10: doubtful symptoms - 11 and more: certain symptoms.

Catastrophism was assessed by Pain catastrophisme scale (PCS). PCS is a thirteen-item scale to identify and quantify the extent of catastrophism in a painful patient. Three subgroups group together the criteria related to rumination (items 8,9,10,11), exaggeration (items 6,7,13) and vulnerability (items 1,2,3,4,5,12) . Patients are asked to rate their personal experience using a five-point rating from 0 to 4. The final score can therefore vary from 0 to 52. A PCS score of 30 or more represents a relevant clinical level of catastrophism.

level of social vulnerability was assessed by Assessment of Precariousness and Health Inequalities in Health Examination Centers (EPICES) questionnaire.

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