Table 1.
Characteristics of a population cross-section at risk for malaria from Bo Rai district in Trat province, Thailand, in June 21–22, 2011
| Subjects (N = 187*) | ||
|---|---|---|
| Number | Percent | |
| Age (years) | ||
| < 15 | 1 | 0.7 |
| 15–49 | 127 | 84.7 |
| 50+ | 22 | 14.7 |
| Missing | 37 | |
| Gender | ||
| Male | 95 | 64.2 |
| Female | 53 | 35.8 |
| Missing | 39 | |
| Ethnicity | ||
| Thai | 98 | 65.3 |
| Cambodian | 13 | 8.7 |
| Burmese Mon | 39 | 26.0 |
| Missing | 37 | |
| Residency status† | ||
| Thai | 98 | 66.2 |
| M1 migrant (≥ 6 months) | 37 | 25.0 |
| M2 migrant (< 6 months) | 13 | 8.8 |
| Missing | 39 | 8.8 |
| Occupation | ||
| Rubber plantation worker | 92 | 62.6 |
| Soldier | 38 | 25.9 |
| Other | 17 | 11.6 |
| Missing | 40 | |
| Self-reported fever in past 3 days | ||
| Yes | 6 | 4.1 |
| No | 141 | 95.9 |
| Missing | 40 | |
| Confirmed malaria case in past 3 months‡ | ||
| Yes | 5 | 3.4 |
| No | 144 | 96.6 |
| Missing | 38 | |
| Frequency of bed net use | ||
| Always | 140 | 94.0 |
| Not always or never | 9 | 6.0 |
| Missing | 38 | |
| Forest visit in past month§ | ||
| Yes | 30 | 20.4 |
| No | 117 | 79.6 |
| Missing | 40 | |
*
Questionnaire data were available for all 61 individuals from the high-risk group screening and only 89 of 126 (70.6%) individuals from contact tracing.
†Thai indicates citizen of Thailand, M1 indicates migrant living in Thailand for greater than 6 months, and M2 indicates migrant living in Thailand for less than or equal to 6 months.
‡Self-reported malaria case in the 3 months preceding blood collection that was confirmed and treated at a malaria clinic or hospital.
§Self-reported visit or stay overnight in forest areas in the past month.