Table 1 Characteristics of the 959 children enrolled in the study of risk factors for anaemia in uncomplicated falciparum malaria
Variables | No. with enrolment haematocrit, n (%)a | Enrolment haematocrit, mean [95% CI] | Anaemia (haematocrit <30%) at presentation, n (%)a | |||
|---|---|---|---|---|---|---|
ALL | Mild | Moderate | Severe | |||
Total | 959 (96.7) | 30.6 [30.3–30.9] | 355 (37) | 323 (33.7) | 30 (3.1) | 2 (0.2) |
Male | 522 (52.6) | 30.5 [30.1–31] | 197 (20.5) | 182 (19) | 14 (1.5) | 1 (0.1) |
Female | 437 (44.1) | 30.7 [30.2–31.2] | 158 (16.5) | 141 (14.7) | 16 (1.6) | 1 (0.1) |
Agedb ≤ 15 months | 121 (12.6) | 29 [28.1–30] | 56 (5.8) | 48 (5) | 8 (0.8) | 0 (0) |
 ≤ 24 months | 256 (25.8) | 29.7 [29.1–30.3] | 108 (11.3) | 93 (9.7) | 14 (1.5) | 1 (0.1) |
 > 24 months | 695 (70.1) | 30.9 [30.6–31.2] | 244 (25.4) | 228 (23.8) | 15 (1.6) | 1 (0.1) |
Asexual parasitaemiac | ||||||
 ≤ 25,000 μL−1 | 559 (52.3) | 30.6 [29.6–30.4] | 225 (23.5) | 203 (21.2) | 20 (2.1) | 2 (0.2) |
 > 25,000–50,000 μL−1 | 141 (14.7) | 31.2 [30.3–32.2] | 41 (4.3) | 35 (3.6) | 6 (0.6) | 0 (0) |
 > 50,000–100,000 μL−1 | 152 (15.8) | 31.3 [30.4–32.1] | 52 (5.4) | 50 (5.2) | 2 (0.2) | 0 (0) |
 > 100,000 μL−1 | 101 (10.5) | 31.4 [30.4–32.4] | 35 (3.6) | 33 (3.4) | 2 (0.2) | 0 (0) |
Gametocytaemia | ||||||
 Present | 47 (4.7) | 28.8 [27.6–30] | 22 (2.3) | 20 (2.1) | 2 (0.2) | 0 (0) |
 Absent | 912 (91.9) | 30.7 [30.3–31] | 333 (34.7) | 303 (31.6) | 28 (2.9) | 2 (0.2) |
Region of enrolment | ||||||
 Eastern flankd | 503 (50.7) | 30.6 [30.1–31.1] | 175 (18.2) | 152 (15.8) | 21 (2.2) | 2 (0.2) |
 Western flanke | 456 (46) | 30.6 [30.1–31] | 180 (18.8) | 171 (17.8) | 9 (0.9) | 0 (0) |