Table 2.

Study population demographics

		Sex		Age (years)					CRP level (mg/L)†
	N	N (%) female	P- value*	Median	IQR	Min	Max	P- value^	Median	IQR	Min	Max
Healthy	58	31 (53.4%)	–	30	13.8	10	59	–	–	–	–	–
Inflammation of unknown origin	36	17 (47.2%)	0.666	44.5	32	1	76	0.425	62.5	66.1	1	342
Still’s disease	34	24 (71.4%)	0.118	30	12.5	16	66	0.855	90.8	100	6.3	374
Familial Mediterranean Fever (FMF)	35	23 (65.7%)	0.206	26	24	3	74	0.321	13.8	25.2	1	293
Behçet’s disease	23	9 (39.1%)	0.335	23	23	6	58	0.126	20.4	26	1.4	286

IQR, interquartile range. * P-value, chi-squared test of sex in relation to disease group compared to healthy. ^ P-value, Mann-Whitney U test (two sided) for age in relation to disease group, compared to healthy. ^† P-value, Kruskal-Wallis test (two sided) for CRP levels among disease groups = 0.736.