Table 3.

Factors associated with absenteeism score 12 months later.

Baseline Factors		GEE Linear Regression^†
Baseline Factors		Coefficient	95% CI
Work	Job type (labor-intensive vs sedentary)	2.7	(0.4–4.9)^*
Work	Presenteeism, %	0.14	(0.07–0.2)^*
Clinical	Commencing biologic (yes vs no)	2.8	(−1.1 to 6.7)^*
	Uveitis (yes vs no)	−1.4	(−4.0 to 1.1)
	Psoriasis (yes vs no)	2.7	(−2.6 to 8.0)
	Inflammatory bowel disease (yes vs no)	1.1	(−4.3 to 6.4)
	Dactylitis (yes vs no)	3.4	(−6.4 to 13.1)
	Peripheral joint involvement (yes vs no)	3.4	(−0.7 to 7.5)^*
	BASDAI (score 0–10)	1.2	(0.7–1.8)^*
	BASFI (score 0–10)	0.9	(0.4–1.4)^*
	BASMI (score 0–10)	−0.2	(−0.9 to 0.4)
	BAS-G (score 0–10)	1.1	(0.6–1.6)^*
Patient	ASQoL (score 0–18)	0.5	(0.3–0.8)^*
	EQ-VAS (score 0–100)	−0.1	(−0.2 to −0.04)^*
	Activity impairment, %	0.13	(0.08–0.2)^*
	Spinal pain (score 0–10)	1.01	(0.5–1.5)^*
	Chalder Fatigue Scale (score 0–11)	0.4	(0.02–0.8)^*
	Sleep disturbance (score 0–20)	0.4	(0.2–0.6)^*
	HADS Anxiety (clinical/borderline vs none)	2.5	(0.06–4.9)^*
	HADS Depression (clinical/borderline vs none)	3.2	(0.07–6.4)^*

↵† Adjusted for age, sex, and deprivation.
↵* Eligible for forward stepwise model (p ≤ 0.2). GEE: generalized estimating equation; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BASFI: Bath AS Functional Index; BASMI: Bath AS Metrology Index; BAS-G: Bath AS Global score; ASQoL: AS Quality of Life questionnaire; EQ-VAS: EuroQol visual analog scale; HADS: Hospital Anxiety and Depression Scale.