In multivariate analysis , CD4 lymphocytes ( Relative Risk ( RR ) for a 50 cells/mm3 variation = 0.82 ; CI : 0.71-0 .96 ) , antiretroviral treatment started before inclusion ( RR = 0.34 ; CI : 0.12-0 .98 ) and history of symptomatic malaria in early pregnancy ( RR = 7.10 ; CI : 2.35-22 .49 ) were associated with the incidence of confirmed or suspected malaria-related fever .