Table 1

Outcome measures used in 14 recent trials in PsA

Manifestation	Outcome measure	Level of measurement	n (%)
Any	No manifestation reported		4 (29)
Enthesitis	Absolute change in Enthesitis score	Change (mean) in Leeds Enthesitis Index	2 (14)
		Change (mean) in PsA modified MASES	3 (21)
		Change (median) in MASES	1 (7)
	Relative change (%) in Enthesitis score	% change in MASES	2 (14)
	Proportion of patients with enthesitis	MASES (0–13) ≥1	2 (14)
	Proportion of patients with change	% of patients with improvement in ≥1 tendon/ligament	1 (7)
	Resolution of enthesitis	MASES=0 (0–13)	1 (7)
		Leeds Enthesitis Index=0 (0–6)	1 (7)
		Enthesitis score=0 (0–4)*	1 (7)
Dactylitis	Absolute change in Dactylitis score	Change (mean) in Dactylitis score (0–20)†	2 (14)
		Change (median) in Dactylitis score (0–20)	1 (7)
		Change (median) in Leeds Dactylitis Index (0–60)	2 (14)
		Change (mean) in Leeds Dactylitis Index (0–60)	2 (14)
	Relative change (%) in Dactylitis score	% change in Leeds Dactylitis Index (0–60)	3 (21)
	Proportion of patients with Dactylitis	Leeds Dactylitis Index (0–60)≥1	2 (14)
	Resolution of Dactylitis	Dactylitis score=0 (0–20)	3 (21)
Nail involvement	Absolute change in score of nail involvement	Change (mean) in modified Nail Psoriasis Severity Index	1 (7)
		Change (median) in modified Nail Psoriasis Severity Index	1 (7)
		Change (median) in Nail Psoriasis Severity Index	1 (7)
	Relative change (%) in score of nail involvement	% change in Nail Psoriasis Severity Index	1 (7)

*Enthesitis score: 4-point enthesitis index to measure the presence (score of 1) or absence (score of 0) of tenderness at the lateral epicondyle humerus (left and right) and proximal Achilles (left and right).
†Dactylitis score: score of 1 for the presence of dactylitis and 0 for the absence in each digit (n=20), for an overall score ranging from 0 to 20.
MASES, Maastricht Ankylosing Spondylitis Enthesitis Score; PsA, psoriatic arthritis.