Table 1.
Cohort demographics
| Main analysis, N = 50,060 | Analysis of rates of malaria over gestational age, N = 19,768 | |||
|---|---|---|---|---|
| Variable | No malaria, N = 41,839 | Malaria, N = 8221 | No malaria, N = 16,841 | Malaria, N = 2927 |
| EGA at 1st ANC, weeks’ gestation | 15.6 {9.6, 23.8}, 0.0–42.0 | 14.8 {9.5, 22.1}, 0.0–41.1 | 7.6 {6.4, 8.7}, 0.0–10.0 | 7.5 {6.1, 8.7}, 0.0–10.0 |
| EGA method | ||||
| Ultrasound | 24,398 (58) | 3809 (46) | 12,385 (74) | 1834 (63) |
| Dubowitz | 9368 (22) | 1727 (21) | 1767 (10) | 401 (14) |
| Fundal height | 6171 (15) | 2108 (26) | 920 (5) | 375 (13) |
| LMP | 1902 (5) | 577 (7) | 1769 (11) | 317 (11) |
| Maternal age, years | 25 {21, 30}, 13–53 | 24 {20, 30}, 14–48 | 26 {21, 31}, 13–52 | 24 {20, 30}, 13–45 |
| Primigravid | 11,107 (27) | 2383 (29) | 4018 (24) | 868 (30) |
| Anaemiaa | 3911 (11) | 1369 (20) | 1508 (9) | 485 (17) |
| Haematocrit,a % | 34 {31, 36}, 10–53 | 33 {30, 35}, 16–49 | 34 {32, 37}, 10–49 | 33 {30, 35}, 16–48 |
| Current smokerb | 7551 (23) | 1897 (35) | 3653 (24) | 817 (35) |
| Site | ||||
| Refugee | 30,103 (72) | 4649 (57) | 12,218 (73) | 1275 (44) |
| Migrant | 11,736 (28) | 3572 (43) | 4623 (27) | 1652 (56) |
| Place of delivery | ||||
| SMRU unit | 24,502 (66) | 3218 (46) | 7612 (69) | 977 (47) |
| At home | 9406 (25) | 3118 (45) | 2509 (23) | 878 (43) |
| Hospital | 3149 (8) | 598 (9) | 984 (9) | 205 (10) |
Numbers are median {interquartile range}, range or frequency (%). Missing (main analysis): maternal age: 30 [<0.0%] (no malaria 25 [<0.0%]; malaria 5 [<0.0%]); smoking status 11,469 [23%] (no malaria 8651 [21%]; malaria 2818 [34%]); haematocrit 7012 [14%] (no malaria 5618 [13%]; malaria 1394 [17%])
EGA estimated gestational age, ANC antenatal clinic, LMP last menstrual period
aMeasured at the last antenatal consultation (within 1 month of delivery for 90% of women)
bSmoking information was only routinely collected from 1997