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. Author manuscript; available in PMC: 2015 Jul 22.
Published in final edited form as: Ann Rheum Dis. 2014 Jan 7;74(5):830–835. doi: 10.1136/annrheumdis-2013-203967

Table 2.

Demographic and disease characteristics of participants

Patient meeting (n=13) 1st postal survey (n=1754)*† 2nd postal survey (n=687)*‡
Male (%) 11 (84.6) 929 (53.0) 372 (54.1)
Age (years), mean±SD 56.8±13.3 48.3±13.4 48.3±14.1
Duration of disease (years), mean±SD 35.3±13.2 22.8±14.0 20.4±13.8
BASDAI, mean±SD 2.6±1.5 5.5±2.4 5.4±2.4
BASFI, mean±SD No data 4.6±2.6 4.5±2.6
Total back pain (NRS 0–10), mean±SD No data 6.0±2.8 4.7±2.8
*

Analysis based on complete dataset regarding demographic questionnaires.

†

Patients from seven English speaking countries (Australia (n=24), Canada (n=255), Ireland (n=91), New Zealand (n=36), Singapore (n=40), UK (n=706) and USA (n=602)) represented four continents (Europe, America, Asia, Australia/New Zealand).

‡

Patients coming from Canada (n=94), Ireland (n=81), New Zealand (n=39), Singapore (n=36), the UK (n=190) and the USA (n=248).

BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; NRS, numerical rating scale.