Table 2 Number of cases and incidence rates of malaria infections in the study population (per 1000 women-month)
| Â | Person-time* | Â | Malaria infections | Â |
|---|---|---|---|---|
| Â | Â | new cases | IR (per 1000) (95% CI) | IRR (95% CI) |
By Gravidity | Â | Â | Â | Â |
   Overall | 5541 | 217 | 39.2 (34.3-44.7) | - |
   Primigravidae | 1095 | 97 | 88.6 (72.6-108.1) | - |
   Secondigravidae | 1146 | 58 | 50.6 (39.1-65.56) | 0.6 (0.42-0.79) |
   Multigravidae | 3300 | 62 | 18.8 (14.65-24.1) | 0.2 (0.17-0.31) |
By SP doses received | Â | Â | Â | Â |
   2 doses SP | 2453 | 113 | 46.1 (38.3-55.4) | - |
   3 doses SP | 884 | 21 | 23.8 (15.5-36.4) | 0.5 (0.28-0.66) |
By Supplementation group | Â | Â | Â | Â |
   MMS | 2726 | 110 | 40.3 (33.5-48.6) | - |
   FSS | 2815 | 107 | 38.0 (31.5-46.0) | 0.9 (0.67-1.18) |