Table 3.

Spearman correlation coefficients of SPARCC score with disease activity, QOL, and WPAI measures.

Variables	N	Spearman Correlation Coefficient	P
CDAI	1852	0.272	< 0.001
HAQ-DI	1855	0.237	< 0.001
DAPSA	1000	0.391	< 0.001
Modified MDA (total score)^{^a}	1659	−0.311	< 0.001
Patient-reported pain	1843	0.230	< 0.001
Patient-reported fatigue	1962	0.201	< 0.001
Patient global assessment	1961	0.117	< 0.001
WPAI
% Work time missed	979	0.135	< 0.001
% Impairment while working	1036	0.191	< 0.001
% Overall work impairment	914	0.206	< 0.001
% Activity impairment	1735	0.253	< 0.001

↵^aThis variable is the total score of the 6 criteria for modified MDA: tender joint count ≤ 1, swollen joint count ≤ 1, BSA ≤ 3%, patient pain VAS ≤ 15, patient global assessment VAS ≤ 20, and HAQ-DI ≤ 0.5. BSA: body surface area; CDAI: Clinical Disease Activity Index; DAPSA: Disease Activity Index for Psoriatic Arthritis; HAQ-DI: Health Assessment Questionnaire–Disability Index; MDA: minimal disease activity (defined as meeting ≥ 5 of the following criteria: tender joint count ≤ 1, swollen joint count ≤ 1, BSA ≤ 3%, patient pain VAS ≤ 15, patient global assessment VAS ≤ 20, and HAQ-DI ≤ 0.5); QOL: quality of life; SPARCC: Spondyloarthritis Research Consortium of Canada; VAS: visual analog scale; WPAI: Work Productivity and Activity Impairment.