WPAI outcome	N	Variable	*OR/Coefficient (95% CI)	P
*Absenteeism	301	FACIT	−0.68 (0.56, 0.82)	<0.001
		Smoking – Non	1	0.07
		Smoking – Ex	0.82 (0.24, 2.74)	<0.001
		Smoking – Current	2.86 (1.07, 7.64)
		Category – Radiographic	1
		Category – Non	6.07, (1.83, 20.1)
Presenteeism	301	FACIT	−3.1 (−4.7, −1.6)	<0.001
		BASDAI	3.0 (1.1, 5.0)	0.002
		BASFI	1.6 (0.0, 3.3)	0.04
		Duration diagnosis (yrs)	−2.0 (−4.2, 0.3)	0.08
WPL	301	FACIT	−3.9 (−5.5, −2.3)	<0.001
		BASDAI	3.0 (1.0, 4.9)	0.003
		BASFI	1.6 (0.1, 3.2)	0.05
Activity Impairment	301	FACIT	−3.9 (−4.7, −3.1)	<0.001
		Smoking – Non	0	0.02
		Smoking – Ex	−4.4 (−7.6, −1.2)	<0.001
		Smoking – Current	−0.8 (−4.8, 3.2)	0.003
		BASFI	4.4 (3.6, 5.2)	<0.001
		EQ-VAS	−1.2 (−2.0, −0.4)
		PGA disease activity	1.7 (0.8, 2.5)