Among participants with early ART , significant decreases were found between M0 and M24 in sexual activity ( Odds Ratio [ OR ] 0.72 , 95 % Confidence Interval [ 95 % CI ] 0.57-0 .92 ) , multiple partnership ( OR 0.57 , 95 % CI 0.41-0 .79 ) , unprotected sex ( OR 0.59 , 95 % CI 0.47-0 .75 ) and risky sex ( OR 0.58 , 95 % CI 0.45-0 .76 ) .