Table 1.

Correlations among selected measures. No adjustment has been made for multiple comparisons.

Measures Correlated	Spearman’s rho	p
Patient and MD global PsA activity	0.76	< 0.01
SJC and MD global PsA activity	0.74	< 0.01
TJC and MD global PsA activity	0.68	< 0.01
Patient global arthritis and HAQ	0.61	< 0.01
TJC and HAQ	0.89	< 0.01
SJC and HAQ	0.54	0.01
Patient global arthritis and SF-36 PCS	0.75	< 0.01
HAQ and SF-36 PCS	0.84	< 0.01
HAQ and PASI	0.41	0.08
Patient global arthritis and PASI	0.52	0.02
Patient global skin and PASI	0.53	0.02
MD global skin and PASI	0.52	0.02
Patient global skin and SF-36 PCS	0.38	0.13
PASI and SF-36 PCS	0.56	0.02
mNAPSI and MD nail global	0.93	< 0.01
mNAPSI and patient nail global	0.55	0.01
mNAPSI and PASI	0.38	0.10
mNAPSI and SF-36 PCS	0.53	0.02
Patient global nail and SF-36 PCS	0.56	0.02
mNAPSI and patient global arthritis	0.42	0.07
mNAPSI and TJC	0.53	0.02
mNAPSI and SJC	0.44	0.05

mNAPSI: modified Nail Psoriasis Severity Index; HAQ: Health Assessment Questionnaire; SJC: swollen joint count; TJC: tender joint count; PASI: Psoriasis Area and Severity Index; SF-36: Medical Outcome Study Short-Form 36; PCS: physical component summary.