Predictors of Chikungunya rheumatism: a prognostic survey ancillary to the TELECHIK cohort study

Table 4 Predictors of Chikungunya virus-specific IgG titres in subjects ≥ 15 years of age in the TELECHIK study, La Réunion, 2007 to 2008

Full multiple regression linear model of CHIKV-specific IgG titres (n= 309)
Variable	β	SD	T	P-value
Gender	0.143	0.088	1.63	0.105
Age, yrs	0.005	0.002	2.36	0.019
Estimated probability of infection^#	0.238	0.290	0.82	0.412
Initial rheumatic involvement	0.143	0.876	1.64	0.102
Time elapsed between infection and test^¶	0.001	0.000	1.94	0.053
Constant	0.810	0.210	3.85	< 0.001
Minimal multiple regression linear model of CHIKV-specific IgG titres ( n = 344)
Variable	β	SD	T	P- value
Gender	0.183	0.081	2.25	0.025
Age, yrs	0.006	0.002	2.82	0.005
Initial rheumatic involvement	0.169	0.811	2.09	0.037
Constant	1.088	0.129	8.39	< 0.001

CHIKV, Chikungunya virus. ^#Derived from the exposure score; ^‡fever ± six or more localisations of arthralgias and at least four other symptoms (defined as severe if the three conditions are gathered, low to moderate if not); ^¶time elapsed between onset of infection and ELISA test.

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