Table 3. Description of an April–May 2009 Outbreak of 2009 Pandemic Influenza A (H1N1) Among the Participants of a Youth Camp and Their Household Contacts in Washington State, United States.
| Characteristic | Camp Participantsa (n = 96) | Household Contactsb (n = 136) |
|---|---|---|
| Type of respondent; no. (%) | ||
| Sixth-grade student | 72 (75) | |
| High school counselor | 8 (8) | |
| School faculty and camp staff | 16 (17) | |
| No. male: no. female | 38:58 | 63:64c |
| Age (years) | ||
| Mean (SD) | 16 (12) | 34d (18) |
| Median (minimum, maximum) | 12 (10, 59) | 41 (0.5, 74) |
| Age group | ||
| Children (≤17 years) | ||
| No. (% of all individuals) | 79e (82) | 48 (35) |
| Mean age in years (SD; minimum, maximum) | 12 (1; 10, 17) | 12 (4; 0.5, 17) |
| Adult (≥ 18 years) | ||
| No. (% of all individuals) | 17 (18) | 88 (65) |
| Mean age in years (SD; minimum, maximum) | 37 (17; 18, 59) | 46 (10; 18, 74) |
| No. cabins or households | 13f | 41 |
| No. of individuals per cabin or household; Mean (SD; minimum, maximum) | ||
| Total | 6.3 (2.8; 1, 10) | 3.3 (1.3; 1, 8) |
| Children | 7.2 (2.1; 4, 10) | 1.2g (0.8; 0, 3) |
| Adults | 3.0h (2.0; 1, 5) | 2.1 (0.7; 1, 5) |
Included are individuals who responded to the survey and were at the camp during the outbreak.
The contacts from the 41 households included in the primary analysis for case definition I are presented in this table.
Sex was not reported for 9 household contacts.
Two household contacts (1 adult and 1 child) were excluded because their ages were unreported.
Seven of the 8 high-school-aged counselors who responded to the survey were ≤17 years of age.
Three cabins housed only adults. Seven children and 7 adults are excluded here due to missing cabin assignments and not sleeping at the camp, respectively.
Eight households contain 0 child contacts.
One adult high-school-aged counselor is excluded, because this person slept in a cabin assigned to children.
SD indicates standard deviation.