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.

Gérardin et al. Arthritis Research & Therapy 2013 15:R9   doi:10.1186/ar4137