Table 1. Characteristics of the study participants.
|
Immigrants
|
Travelers |
Semi-Immune
|
|||
|---|---|---|---|---|---|
| Characteristics | Malaria | No Malaria | Malaria | Malaria | No Malaria |
| N | |||||
| Day 0 | 55 | 37 | 20 | 50 | 27 |
| Day 7 | 29 | 0 | 12 | 0 | 0 |
| Age, median IQR (years)a | 34 (29-; 43) | 36 (30; 44) | 32 (28.5; 38.5) | 33 (27; 42) | 41 (39, 43) |
| Sexb, n (%) | |||||
| Males | 40 (73) | 23 (62) | 15 (75) | 28 (56) | 26 (96) |
| Origin area, n (%) | |||||
| Europe | 0 (0) | 0 (0) | 17 (85) | 0 (0) | 0 (0) |
| Africa | 54 (100) | 37 (100) | 0 (0) | 50 (100) | 27 (100) |
| Others | 0 (0) | 0 (0) | 3 (15) | 0 (0) | 0 (0) |
| Time since immigration, median IQR (years)c | 7 (5; 14) | 5 (2; 9) | na | na | na |
| Number of previous returns, n (%) | |||||
| 0 | 5 (10) | 16 (47) | na | na | na |
| 1-2 | 11 (21) | 5 (15) | na | na | na |
| 3-4 | 26 (50) | 4 (12) | na | na | na |
| >5 | 10 (19) | 9 (27) | na | na | na |
| Parasitemia by microscopy | |||||
| median IQR (%)d | 0.4 (0.02; 1.5) | na | 0.075 (0.01;0.8) | nd | na |
| median IQR (parasites/μl) | nd | na | nd | 34783.5 (7721, 55122) | na |
Abbreviations: IQR, interquartile range; nd, not determined; na, not applicable
a
P=0.0515 Kruskal Wallis test. Data missing from 2 semi-immune adults without malaria
b
P=0.001 χ2
c
P= 0.0362 Wilcoxon Rank Sum test. Data available from 52 immigrants with malaria and 34 without malaria.
d
P=0.0890 Wilcoxon Rank Sum test.