Table 4

Sensitivity, specificity, positive predictive value, negative predictive value and likelihood ratio of PASS with respect to the different indices used

	Sensitivity (95% CI)	Specificity (95% CI)	Positive predictive value (95% CI)	Negative predictive value (95% CI)	Likelihood ratio
MDA	0.96 (0.87 to 0.99)	0.46 (0.32 to 0.61)	0.67 (0.55 to 0.77)	0.92 (0.73 to 0.99)	1.8
VLDA	1 (0.82 to 1)	0.35 (0.22 to 0.48)	0.30 (0.18 to 0.44)	1 (0.80 to 1)	1.6
DAPSA low disease activity	0.81 (0.66 to 0.91)	1 (0.81 to 1)	1 (0.9 to 1)	0.69 (0.48 to 0.85)	–
DAPSA remission	1 (0.76 to 1)	0.38 (0.24 to 0.53)	0.32 (0.19 to 0.48)	1 (0.81 to 1)	1.62
PsAID ≤4	0.79 (0.65 to 0.89)	0.77 (0.52 to 0.93)	0.90 (0.77 to 0.97)	0.58 (0.36 to 0.77)	3.5
HAQ-DI ≤0.5	0.86 (0.74 to 0.93)	0.68 (0.43 to 0.87)	0.89 (0.78 to 0.95)	0.61 (0.38 to 0.81)	2.7

DPASA, disease activity score for psoriatic arthritis; HAQ-DI, Health Assessment Questionnaire-Disability Index; MDA, minimal disease activity; PASS, Patient’s acceptable symptom state; PsAID, Psoriatic arthritis impact of disease; VLDA, very low disease activity.