The knowledge of the serologic status of individuals helps to initiate adequate policies in the fight
against HIV. Unfortunately in many African countries the HIV screening rate is significantly low. It
is approximately 5% of the total populations in many sub-Sahara African countries, precisely 4.7%
in Ivory Coast. But, the African continent is the most infected one and account for 70% of death due
to HIV. The present work target was to study, firstly, the factors that influence the decision of
individuals to accept or refuse a proposed screening test and, secondly, the factors that made those
who have already done the test for doing it themselves. The Heckman two stage method is used to
extract factors of acceptability of the screening test and two “new unbalanced logit” methods are
proposed to estimate determinants of a HIV screening test, for people who have done a test on their
one initiative.