Table 4.

Logistic regression analysis for the entheseal sites that were associated with PsA versus controls.

Variables	Multivariable Reduced Model A^*		Multivariable Reduced Model B^**
	Estimate (SE)	p	Estimate (SE)	p
Intercept	0.50 (0.43)		0.53 (0.44)
Patellar ligament insertion into distal patella	0.78 (0.36)	0.03	0.88 (0.35)	0.01
Patellar ligament insertion into tibial tuberosity	0.69 (0.38)	0.07	0.81 (0.44)	0.06
Achilles tendon	1.07 (0.58)	0.06	0.95 (0.53)	0.07
Plantar fascia	0.93 (0.49)	0.06	0.89 (0.48)	0.06
Lateral epicondyle	0.77 (0.29)	0.007	0.78 (0.28)	0.005
Supraspinatus	1.37 (0.47)	0.004	1.42 (0.51)	0.005

↵* All 5 elementary lesions were scored as binary variables (0 = absent, 1 = present).
↵** Doppler signal and enthesophytes were scored by severity on a scale of 0–3. The remaining variables were scored as 0 = absent, 1 = present. PsA: psoriatic arthritis.