Table 2.
Characteristics of the study population
| Whole assessed population N = 46 |
Mining site | Others N = 3 |
p value | |||
|---|---|---|---|---|---|---|
| Sophie N = 26 |
Dagobert N = 12 |
Repentir N = 5 |
||||
| Sociodemographic data | ||||||
| Population | ||||||
| Estimated population in the mining site | na | 36 | 37 | 200 | na | |
| Proportion of population assessed | na | 72.2% | 32.4% | 2.5% | na | |
| Sex | ||||||
| Male | 37 (80.4%) | 23 (88.5%) | 9 (75%) | 4 (80%) | 1 (33.3%) | 0.137 |
| Female | 9 (19.6%) | 3 (11.5%) | 3 (25%) | 1 (20%) | 2 (66.7%) | |
| Place of birth | ||||||
| Brazil | 46 (100%) | 26 (100%) | 12 (100%) | 5 (100%) | 3 (100%) | 0.042 |
| Maranhão | 17 (37%) | 12 | 3 | 0 | 2 | |
| Para | 12 (26.1%) | 6 | 6 | 0 | 0 | |
| Amapa | 4 (8.7%) | 1 | 1 | 2 | 0 | |
| Other states | 12 (26.1%) | 7 | 2 | 2 | 1 | |
| Missing data | 1 (2.2%) | 0 | 0 | 1 | 0 | |
| Time in gold mining (in months) | ||||||
| Average (sd) | 73 (± 94) | 92 (± 85) | 53 (± 62) | 26 (± 52) | 145 (± 248) | |
| Median [interquartile range] | 48 [8–120] | 78 [36–120] | 30 [0.75–96] | 5 [1–5] | 3 [1–432] | |
| Medical data | ||||||
| Malaria crises in the last 3 months (declared) | ||||||
| At least one | 21 (45.7%) | 14 | 6 | 1 | 0 | 0.219 |
| None | 22 (47.8%) | 11 | 5 | 3 | 3 | |
| Missing data | 3 (6.5%) | 1 | 1 | 1 | 0 | |
| Malaria attack rate in the last 3 months | na | 53.8% [34.6–73] | 50% [21.7–78.3] | 20% [− 15.1 to 55.1] | na | |
| RDT | ||||||
| Number of RDTs performed | 13 | 7 | 4 | 1 | 1 | |
| Number of RDTs positive | 2 | 1 Pf | 1 non-Pf | 0 | 0 | |
| PCR | ||||||
| Number of PCR performed | 43 | 25 | 11 | 5 | 2 | 0.403 |
| Number of PCR positive | 19 | 15 | 2 | 1 | 1 | |
| Prevalence [IC95%] | 44.2% [29.4–59] | 60% [40.8–79.2] | 18.2% [− 4.7 to 40.7] | a | a | |
| Asymptomatics carriers | 15 (78.9%) | 12 (80%) | 1 (50%) | 1 (100%) | 1 (100%) | |
aNot calculated because of sample size