Table 2.

Agreement between detected skin enhancements and physician’s diagnosis

	Pso/PsA		RA		Healthy
	n = 80		n = 78		n = 25
	N	%	N	%	N	%	p value
FOI positive	58	72.5	16	20.5	7	28.0	< 0.001
FOI Diagnosis
Pso / PsA	58	72.5	16	20.5	7	28.0
RA	16	20.0	60	76.9	1	4.0
Healthy	6	7.5	2	2.6	17	68.0
If FOI positive: FOIAS grades							0.255
1	13	22.4	4	25.0	0	0.0
2	42	72.4	9	56.3	6	85.7
3	3	5.2	3	18.8	1	14.3
If FOI positive (n = 81): localization
Region 1	26	32.5	12	15.4	4	16.0	0.026
Region 2	28	35.0	5	6.4	6	24.0	< 0.001
Region 3	8	10.0	7	9.0	4	16.0	0.598
Region 4	23	28.8	12	15.4	5	20.0	0.123
Region 5	39	48.8	10	12.8	4	16.0	< 0.001