Though the prevalence of LBW in both intervention groups was similar ( adjusted Incident Rate Ratio , AIRR = 0.92 , 95 % CI : 0.69-1 .24 ) in the ITT analysis , the risk of severe anaemia was significantly lower in the SP3 group compared to the SP2 group ( AIRR = 0.38 , 95 % CI : 0.16 - 0.90 ) .