Table 2.
Asembo Bay cohort study sample characteristics, Nyanza Province, Kenya, 1992–1996
| Children ages 0–30 months (n = 1,182) | |||
|---|---|---|---|
| Observed data visits = 18,028 | 50 Datasets with imputed data visits = 901,400 | ||
| Variable | N (%) or mean (SE) | Missing, n (%) | N (%) or mean (SD) |
| Height-for-age Z score | −1.57 (0.01) | 4,934 (27.4) | −1.61 (0.01) |
| Weight-for-age Z score | −0.45 (0.01) | 4,353 (24.2) | −0.46 (0.01) |
| Weight-for-height Z score | 0.63 (0.01) | 5,073 (28.1) | 0.63 (0.01) |
| Non-malarial illness* | 5,225 (37.5) | 4,106 (22.8) | 414,982 (46.0) |
| Non-malarial anemia* | 1,434 (10.5) | 4,342 (24.1) | 152,618 (16.9) |
| Febrile parasitemia prevalence | 3,123 (21.3) | 3,375 (18.7) | – |
| Afebrile parasitemia prevalence | 6,365 (43.4) | 3,375 (18.7) | – |
| Febrile parasitemia incidence | 1,400 (9.6) | 3,375 (18.7) | – |
| Afebrile parasitemia incidence | 2,452 (16.7) | 3,375 (18.7) | – |
SES = socioeconomic status. Outcome data (parasitemia variables) were imputed but not used in the final outcome models. The missing column indicates the number (%) of visits for which data were imputed.
*
Non-malarial anemia and non-malarial illness were measured in the month before the exposure.