Research Article
Selective Intermittent Preventive Treatment of Vivax Malaria: Reduction of Malaria Incidence in an Open Cohort Study in Brazilian Amazon
Table 1
Demographic characteristics and malaria baseline survey in the study’s communities, in 2007 and 2008.
| Characteristics |
Group | Locality | | São Sebastião | Vila Amazonas | Cachoeira do Teotônio |
| | 0–5 | 32 (11.4) | 20 (10.1) | 36 (9.2) | | Age group (%) | 6–15 | 73 (26.2) | 46 (23.2) | 93 (23.7) | 0.737 | | >15 | 174 (62.4) | 132 (66.7) | 263 (67.1) | | | Total | 279 | 198 | 392 | | Gender (%) | Male | 149 (53.4) | 119 (60.1) | 218 (55.6) |
0.344 | Female | 130 (46.6) | 79 (39.9) | 174 (44.4) | Previous malaria cases within age group (%) | None | 36 (12.9) | 23 (11.6) | 61 (15.6) |
0.594 | 1–4 | 94 (33.7) | 59 (29.8) | 121 (30.9) | 5–10 | 89 (31.9) | 62 (31.3) | 113 (28.8) | >10 | 60 (21.5) | 54 (27.3) | 97 (24.7) | Living in endemic area, in years, Mean ± SD (CI 95% mean) | | 22.89 ± 17.92 (20.79–25.00) | 13.86 ± 14.23 (11.86–15.85) | 7.88 ± 10.81 (6.81–8.95) | <0.001 | Malaria incidence in 2007, before the study cases/100 inhabitants (CI 95%) | | 24.9 (19.7–30.7) | 28.5 (22.1–35.6) | 26.6 (22.4–31.3) | 0.824 | P. vivax prevalence % (CI 95%) | | 19.0 (14.4–24.4) | 23.8 (17.9–30.6) | 21.6 (17.7–26.0) | 0.626 | P. vivax prevalence proportion % (CI 95%) | | 76.3 (64.2–85.8) | 83.7 (71.3–92.1) | 81.2 (72.7–87.9) | 0.945 | P. vivax in APC prevalence % (CI 95%) | | 6.5 (4.0–9.8) | 15.7 (11.1–21.2) | 11.7 (8.8–15.2) | 0.014 | P. falciparum prevalence % (CI 95%) | | 5.9 (3.4–9.5) | 4.7 (2.2–8.6) | 5.0 (3.1–7.6) | 0.335 | P. falciparum prevalence proportion % (CI 95%) | | 23.7 (14.2–35.8) | 16.3 (7.9–28.7) | 18.8 (12.1–27.3) | 0.715 | P. falciparum APC prevalence % (CI 95%) | | 1.1 (0.3–2.9) | 6.1 (3.3–10.1) | 1.3 (0.5–2.8) | <0.001 |
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SD: standard deviation. CI 95%: confidence interval. : value. APC: asymptomatic Plasmodium carrier (Apr/2008).
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