Risk factors of Streptococcus suis infection on univariate analysis.

(1)Crude OR based on logistic (hospital controls) or conditional logistic regression (community controls).(2)Adjusted for age, sex and rural/urban residence, using logistic regression.(3)Adjusted for sex (matched for age and residence), using conditional logistic regression.(4)Only individuals with pigs at home were analyzed. OR could not be analyzed for community controls because none of them reported ill pigs at home.(5)Only individuals who had pig swab samples at their houses were analyzed. OR could not be analyzed for community controls because there was no discordant pairs included in the analysis.