Table 3. Conditions defining profiles of high and low risk of malaria transmission, Machadinho, 1985, subarea 1
Profile | Conditions | Domain | Marginal frequencies , % | Estimated probabilities , % |
High risk | 1. Settler arrived in Machadinho in either 1984 or 1985 | B | 81.3 | 100.0 |
2. Settler is not the first owner of the plot | B | 60.4 | 69.2 | |
3. The house has poor quality walls | E | 76.9 | 100.0 | |
4. The house has poor quality roof | E | 67.0 | 100.0 | |
5. The house has only 1 or 2 rooms | E | 71.4 | 100.0 | |
6. Settler has plans to build another house in the next year | B | 76.9 | 94.5 | |
7. The distance to nearest forest is less than 100 meters | E | 61.5 | 78.6 | |
8. Source of water used in the household is inappropriate | E | 73.6 | 100.0 | |
9. SUCAM did not spray DDT inside the house | B | 70.3 | 90.1 | |
10. No major crop is cultivated in the plot | B | 87.0 | 98.0 | |
11. Head of the household’s wife has only 2-4 years of education | B | 22.0 | 42.6 | |
12. Settler did not use insecticide | B | 79.1 | 87.3 | |
13. Distance from the house to pools of stagnant water (excluding culverts) is less than 600 meters | E | 12.1 | 22.6 | |
14. Cleared area in the plot is less than 7 ha | E | 35.2 | 65.9 | |
15. Municipality of residence in the 12 months prior to Machadinho was Ariquemes, Jaru, other area in Rondônia or other State | B | 42.0 | 78.0 | |
16. Plot is within 900 meters from the Castanheira forest reserve | E | 17.6 | 32.3 | |
17. All family is living in Machadinho | B | 67.0 | 74.6 | |
18. For those who have family members that did not come to Machadinho, they are living in Jaru | B | 4.4 | 8.2 | |
19. Settler did not travel to the urban area | B | 5.5 | 10.2 | |
20. Settler did not travel to cities along BR-364 | B | 14.3 | 27.0 | |
Low risk | 1. Has lived in the house for 6 months or more | B | 8.8 | 19.0 |
2. Settler arrived in Machadinho before 1984 | B | 18.7 | 40.1 | |
3. The house has good quality walls | E | 23.1 | 49.4 | |
4. The house has good quality roof | E | 33.0 | 70.5 | |
5. The house has good quality sealing | E | 4.4 | 9.5 | |
6. The house has more than 2 rooms | E | 28.6 | 69.6 | |
7. The household owns more than 5 goods | B | 61.5 | 73.4 | |
8. Distance from the house to pools of stagnant water (excluding culverts) is greater than 600 meters | E | 84.6 | 100.0 | |
9. Distance to the nearest neighbor is greater than 2 Km | E | 1.1 | 2.4 | |
10. Plot is at a distance of 10-20 Km from the health post in the urban area | E | 4.4 | 9.4 | |
11. Settlers do not use any plant to treat malaria | B | 67.0 | 86.9 | |
12. SUCAM sprayed DDT inside the house | B | 25.3 | 46.8 | |
13. Cleared area in the plot is greater than 22 ha | E | 46.2 | 83.4 | |
14. Different crops are cultivated in the plot | B | 12.0 | 26.8 | |
15. Distance to the culvert is less than 600m | E | 7.7 | 16.5 | |
16. Municipality of residence in the 12 months prior to Machadinho was Ouro Preto | B | 6.6 | 14.3 | |
17. Plot is not within 900 meters of Castanheira forest reserve | E | 82.4 | 100.0 | |
18. Source of water used in the household is good | E | 26.4 | 54.5 | |
19. For those who have family members that did not come to Machadinho, they are living in Ariquemes | B | 13.2 | 28.3 | |
20. Settler has no plans to build another house in the next year | B | 14.3 | 30.3 |
The third column indicates how each condition was classified into the two broad domains described in Table 1 of the article. E, environmental; B, behavioral/economic. The last column contains frequencies of occurrence of the stated conditions for plots that have extreme, or ideal, types, i.e. either high risk (g = 1) or low risk (g = 0).