Table 1 Summary of questionnaires

Baseline

0

Co-morbidities, family history, age of diagnosis and first symptoms, BASDAI [22], BASFI [23], QOL [32], visits to professionals

Not at work

3 months

Previous occupation, activity impairment questionnaire

At work

3 months

Work limitations questionnaire (WLQ) [38], Work productivity and activity impairment questionnaire (WPAI-SHP) [39, 40]

Follow up

6, 12 months

BASDAI [22], BASFI [23], QOL [32], other conditions

AS costs

9 months

Visits to professionals, tests done, other conditions, medications, costs of various aspects of treatment and disability

Exercise and fatigue

15 month

International Physical Activity Questionnaire (IPAQ) [33], BASDAI [22], BASFI [23], Behavioural regulation in exercise questionnaire (BREQ-2) [34], Pittsburgh Sleep Quality Index [35], Hospital Anxiety and depression Scale [36, 37]

Medication

0,3,6,9,12,15 months

Medication