Table 2.

Multivariable regression analyses

Patient characteristics	Relative risk	95% CI	p value
Sex
Male	Reference
Female	0.33	0.93	0.32
Age group (years)
18–29	0.91	1.03	0.91
30–39	0.76	1.07	0.75
40–49	0.77	0.93	0.77
50–59	0.39	0.80	0.39
60–69	0.80	1.06	0.80
≥ 70	Reference
Biologic history
Yes	Reference
No	1.26	1.00–1.60	0.05
Region
Ontario	0.05	0.83	0.04
Québec	Reference
East	0.66	0.93	0.66
Unknown	0.61	0.87	0.61
Disease control at baseline (initial BASDAI)
Controlled	1.82	1.26–2.62	0.0013
Not controlled	Reference
Days lapsed, median days (IQR)	1.00	1.00–1.00	0.39
Disease control (follow-up BASDAI)
Controlled	1.23	1.06–1.42	0.0055
Not controlled	Reference

The comparison of cohort characteristics was performed using Poisson regression, with robust error variance adjusting for age, sex, region, biologics-naïve status, disease control status at baseline, and number of days between assessments

BASDAI Bath Ankylosing Spondylitis Disease Activity Index, CCC care coach call, CI confidence interval, IQR interquartile range, PSP patient support program