| 
      
        |   | ALL | MONO-DUAL THERAPY | HAART |   p |  
        | Median of the periods | 2002 | 1998 (1995-2008) | 2004 (1998-2009) |   |  
        | Mother-infant    pairs | 311 | 136 | 175 |   |  
        | Mean maternal age    at delivery (years) | 32.6±6.7 | 31.5±4.7 | 33.6±7.8 | 0.0003 |  
        | Route of transmission  (sexual /    IVDU) | 181/50 | 70/28 | 111/22* | 0.03 |  *: + 3 mothers infected by MTCT, IVDU: intra venous drug user Table 2: Mothers’
 demographic data
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