Table 1. Demographic characteristics for participants in a study of clinical malaria along the China–Myanmar border, Yunnan Province, China, January 2011–August 2012*.
| Characteristic | No. (%) febrile case-patients, n = 8,296 | No. (%) suspected cases, n = 656 | No. (%) confirmed cases, n = 303 | Odds ratio (95% CI) |
|---|---|---|---|---|
| Nationality | ||||
| Chinese | 6,002 (83) | 586 (89) | 257 (85) | 1 |
| Myanmarese |
1,232 (17) |
70 (11) |
46 (15) |
2.5 (1.5–4.1)† |
| Sex | ||||
| F | 3,648 (44) | 88 (13) | 27 (9) | 1 |
| M |
4,629 (56) |
568 (87) |
276 (91) |
2.1 (1.3–3.5)‡ |
| Age, y | ||||
| <18 | 1,864 (23) | 66 (10) | 16 (5) | 1 |
|
>18 |
6,359 (77) |
590 (90) |
287 (95) |
3.0 (1.6–5.3)† |
| Occupation | ||||
| Indoor worker§ | NC | 64 (10) | 10 (3) | 1 |
| Farmer | NC | 433 (66) | 203 (67) | 4.8 (2.4–9.6)† |
| Business person | NC | 78 (12) | 41 (14) | 6.0 (2.7–13.4)† |
| Mobile worker¶ |
NC |
78 (12) |
49 (16) |
9.1 (4.0–20.6)† |
| Use of preventive measures# | ||||
| No | NC | 257 (39) | 209 (69) | 1 |
| Yes | NC | 399 (61) | 94 (31) | 0.07 (0.05–0.10)† |
*For some case reports, information was missing for nationality, sex, age, or occupation. NC, not calculated because information was missing for a considerable number of febrile cases. †p<p 0.001. ‡P<0.01. §Students, preschool children, office workers, and housewives were categorized as “indoor work.” ¶Mobile workers included truck drivers, construction workers and casual workers who worked in plantation farms. #Indicates use of bed net, indoor residual spray, and repellents.