Table 3.

Comparison of disease outcome scores for patients with axSpA only, multimorbid patients with 1 additional condition, and multimorbid patients with 2 or more conditions.

Disease Outcome	Group	N	Mean	SD	Tukey HSD Comparisons^†
Disease Outcome	Group	N	Mean	SD	axSpA Only	1 Additional Condition
BASDAI	axSpA only	326	3.5	2.4	—	—
	1 additional condition	178	4.2	2.4	< 0.01^*	—
	≥ 2 additional conditions	221	4.7	2.3	< 0.01^*	0.16
BASFI	axSpA only	331	2.7	2.4	—	—
	1 additional condition	180	4.0	2.6	< 0.01^*	—
	≥ 2 additional conditions	223	4.8	2.6	< 0.01^*	< 0.01^*
BASMI	axSpA only	322	2.7	2.3	—	—
	1 additional condition	173	3.6	2.5	< 0.01^*	—
	≥ 2 additional conditions	218	4.8	2.6	< 0.01^*	< 0.01^*
ASQoL	axSpA only	330	5.2	5.3	—	—
	1 additional condition	179	7.5	5.5	< 0.01^*	—
	≥ 2 additional conditions	223	7.9	5.7	< 0.01^*	0.76
HAQ	axSpA only	330	0.39	0.45	—	—
	1 additional condition	180	0.57	0.51	< 0.01^*	—
	≥ 2 additional conditions	221	0.72	0.59	< 0.01^*	0.01^*

↵† P values presented.
↵* Denotes significant difference. — Denotes duplicate cells left blank. ASQoL: Ankylosing Spondylitis Quality of Life index; BASDAI: Bath Ankylosing Spondylitis Disease Activity Index; BASFI: Bath Ankylosing Spondylitis Functional Index; BASMI: Bath Ankylosing Spondylitis Metrology Index; HAQ: Health Assessment Questionnaire; HSD: honestly significant difference; axSpA: axial spondyloarthritis.