Outcome | Proportion of pregnancy under the protection of IRS | ||
---|---|---|---|
None | >0–20 % | >20–43 % | |
Placental blood positive for malaria parasites by LAMPa | |||
 Risk | 22/131 (16.8 %) | 1/88 (1.1 %) | 1/61 (1.6 %) |
 aORb (95 % CI) | Reference group | 0.03 (0–0.25) | 0.05 (0.01–0.41) |
 P value | 0.001 | 0.006 | |
Any evidence of placental malaria by histopathologya | |||
 Risk | 63/132 (47.7 %) | 25/88 (28.4 %) | 17/62 (27.4 %) |
 aORb (95 % CI) | Reference group | 0.77 (0.35–1.69) | 0.63 (0.27–1.48) |
 P value | 0.51 | 0.29 | |
Moderate-high grade pigment deposition by histopathologya | |||
 Risk | 37/132 (28.0 %) | 11/88 (12.5 %) | 9/62 (14.5 %) |
 aORb (95 % CI) | Reference group | 0.52 (0.20–1.36) | 0.54 (0.20–1.47) |
 P value | 0.18 | 0.23 | |
 Risk | 28/134 (20.9 %) | 9/90 (10.0 %) | 2/65 (3.1 %) |
LBW (<2500Â g) | |||
 aORb (95 % CI) | Reference group | 0.29 (0.12–0.75) | 0.08 (0.02–0.39) |
 P value | 0.01 | 0.002 | |
 Risk | 23/134 (17.2 %) | 3/90 (3.3 %) | 1/65 (1.5 %) |
Pre-term delivery (<37Â weeks) | |||
 aORb (95 % CI) | Reference group | 0.13 (0.03–0.53) | 0.05 (0.01–0.43) |
 P value | 0.005 | 0.006 | |
Fetal/neonatal deaths | |||
 Risk | 10/134 (7.5 %) | 1/90 (1.1 %) | 0/65 (0 %) |
 aORb (95 % CI) | Reference group | 0.10 (0–0.86) | 0 (n/a) |
 P value | 0.03 | 0.03 |