Table 1. List of explanatory categorical variables.
| Categorical (nominal) Variables | No of levels |
| House | 36 |
| Independent Family | 12 |
| Sex | 2 |
| Haemoglobin Type (AA,AS,SS,AC,SC) | 5 |
| ABO blood group | 4 |
| G6PD Haplotype (on 4 SNPs: G6PD-376*, G6PD-202*, G6PD-968* and G6PD-542*) | 11 |
| PMI | 2 |
| POI | 2 |
| Birth during the project | 2 |
| Categorical (ordered) Variables | No of levels |
| Drug treatment period | 4 |
| Year | 19 |
| Trimester | 4 |
| ABO-261*: rs8176719 | 3 |
| ABO-297*: rs8176720 | 3 |
| ABO-467*: rs1053878 | 3 |
| ABO-526*: rs7853989 | 3 |
| ABO-771*: rs8176745 | 3 |
| Alpha globin-3.7deletion | 3 |
| G6PD-202*: rs1050828 | 3 |
| G6PD-376*: rs1050829 | 3 |
| G6PD-542*: rs5030872 | 3 |
| G6PD-968*: rs76723693 | 3 |
Note.-G6PD = Glucose-6-phosphate dehydrogenase, PMI = P. malariae infection, POI = P. ovale infection.
*
Position on the amino-acid sequence.