Table 4

Correlation of original BASDAI and mini-BASDAI with patient global, BASFI, physician global and CRP in GESPIC, TNFα trial population and NSAID trial population

AS (sub)population		Parameters	Correlation of original BASDAI with parameter	Correlation of mini-BASDAI with parameter
GESPIC, baseline	Total group	Patient global	0.76	0.77
		BASFI	0.77	0.70
		Physician global	0.55	0.54
		CRP	0.11	0.09
	“P−” group	Patient global	0.76	0.78
		BASFI	0.74	0.69
		Physician global	0.55	0.56
		CRP	0.15	0.13
	“P+” group	Patient global	0.70	0.70
		BASFI	0.76	0.67
		Physician global	0.44	0.42
		CRP	−0.03	−0.01
TNFα trial population, baseline	Total group	Patient global	0.56	0.47
		BASFI	0.80	0.71
		Physician global	0.40	0.25
		CRP	0.09	0.01
	“P−” group	Patient global	0.59	0.41
		BASFI	0.72	0.69
		Physician global	0.27	0.23
		CRP	0.13	0.03
	“P+” group	Patient global	0.49	0.46
		BASFI	0.86	0.70
		Physician global	0.41	0.21
		CRP	0.04	−0.04
TNFα trial population, week 12	Total group	Patient global	0.90	0.87
		BASFI	0.89	0.85
		Physician global	0.70	0.65
		CRP	0.25	0.21
	“P−” group	Patient global	0.89	0.85
		BASFI	0.89	0.85
		Physician global	0.80	0.79
		CRP	0.31	0.28
	“P+” group	Patient global	0.92	0.88
		BASFI	0.88	0.84
		Physician global	0.61	0.54
		CRP	0.25	0.18
NSAID trial population, baseline	Total group	Patient global	0.52	0.54
		BASFI	0.53	0.53
		Physician global	0.35	0.36
		CRP	0.05	0.06
NSAID trial population, week 12	Total group	Patient global	0.83	0.85
		BASFI	0.80	0.77
		Physician global	0.72	0.74
		CRP	0.10	0.11

“P−”, subgroup of ankylosing spondylitis (AS) patients without peripheral involvement at baseline, 70.6% in the German Spondyloarthritis Inception Cohort (GESPIC) and 39.6% in the tumour necrosis factor alpha (TNFα) trial population. “P+”, subgroup of AS patients with peripheral involvement at baseline, 29.4% in the GESPIC and 61.4% in the TNFα trial population. BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; mini-BASDAI, BASDAI without Q3_arthritis and Q4_enthesitis; BASFI, Bath Ankylosing Spondylitis Functional Index; CRP, C-reactive protein; NSAID, non-steroidal anti-inflammatory drug.