Table 2.

Distribution of initial severity scores calculated with the first factorial axis of the multiple correspondence analysis according to rheumatic disorders reported by CHIKV + patients in 2008 (N = 85), cohort of French Gendarmes (2006–2008)

	No rheumatic disorders d	Arthralgia d	p*	Arthritis d	p*
	N = 13 (15.3%)	N = 33 (38.8%)		N = 39 (45.9%)
Median overall severity score (IQ)	0 (0–39.7)	60.8 (22.3-79.6)	0.024	73.2 (60.9-82.3)	0.001
Median acute stage severity score (IQ)	0 (0–43.3)	60.0 (24.9-78.8)	0.042	75.4 (56.5-82.0)	0.002
Median early chronic stage severity score (IQ)	0 (0–61.7)	61.7 (31.1-89.1)	0.025	72.6 (50.3-100.0)	0.001

IQ: interquartile 25%-75%.

*Kruskal-Wallis test comparing the distribution of severity scores according to rheumatic symptoms, considering “No rheumatic disorders” as reference.

^dArthralgia = joint pain and/or stiffness. Arthritis = swelling in addition to joint pain and stiffness.