Table 3 Epidemiological characteristics of cases in case–control studies
From: Analysis of the relapse of imported Plasmodium vivax and Plasmodium ovale in five provinces of China
Number of patients (100%) | Relapse or recrudescence | Control group | ||
|---|---|---|---|---|
P. vivax | P. ovale | P. vivax | P. ovale | |
n = 26 (%) | n = 49 (%) | n = 93 (%) | n = 196 (%) | |
Province | ||||
 Anhui | 2 (7.69) | 3 (6.1) | 8 (8.6) | 12 (6.1) |
 Zhejiang | 6 (23.1) | 12 (24.5) | 22 (23.7) | 32 (16.3) |
 Hubei | 2 (7.69) | 2 (4.1) | 8 (8.6) | 8 (4.1) |
 Henan | 7 (26.9) | 9 (18.4) | 28 (30.1) | 35 (17.9) |
 Guangxi | 9 (34.6) | 23 (46.9) | 27 (29.0) | 109 (55.6) |
Ages | ||||
 21–30 | 4 (15.4) | 4 (8.2) | 23 (24.7) | 24 (12.2) |
 31–40 | 8 (30.8) | 15 (30.6) | 26 (28.0) | 66 (33.7) |
 41–50 | 10 (38.5) | 14 (28.6) | 33 (35.5) | 70 (35.7) |
 51–60 | 4 (15.4) | 16 (32.7) | 11 (11.8) | 36 (18.4) |
Gender | ||||
 Male | 25 (96.2) | 47 (96.0) | 90 (96.8) | 190 (97.0) |
 Female | 1 (3.8) | 2 (4.0) | 3 (3.2) | 6 (3.0) |
Infection area | ||||
 Asia | 9 (34.6) |  | 32 (34.4) |  |
 Oceania | 1 (3.8) |  | 3 (3.2) |  |
 East Africa | 9 (34.6) | 3 (6.1) | 36 (38.7) | 12 (6.1) |
 West Africa | 3 (11.5) | 19 (38.8) | 8 (8.6) | 76 (38.8) |
 Central Africa | 4 (15.4) | 24 (49.0) | 14 (15.1) | 96 (49.0) |
 Southern Africa |  | 3 (6.1) |  | 12 (6.1) |