Table 2. Prevalence and prevalence ratio of anti-CHIKV antibodies in participants aged 2–14 years, District II of Managua, March–April 2015.
| N | Prevalence (95%CI) | Prevalence ratio (95%CI) | Adjusted prevalence ratio (95%CI) | |
|---|---|---|---|---|
| Total | 3,362 | 6.1 (5.3, 6.9) | - | - |
| Sex | ||||
| Female | 1,685 | 5.7 (4.6, 6.9) | 1 | 1 |
| Male | 1,677 | 6.4 (5.3, 7.7) | 1.13 (0.96, 1.32) | 1.13 (0.97, 1.33)b |
| Age (years) | ||||
| 2–4 | 793 | 4.8 (3.4, 6.5) | 1 | 1 |
| 5–9 | 1,336 | 4.2 (3.2, 5.4) | 0.87 (0.68, 1.10) | 0.88 (0.69, 1.11)b |
| 10–14 | 1,233 | 8.9 (7.4, 10.7) | 1.86 (1.50, 2.30) | 1.85 (1.50, 2.29)b |
| Socioeconomic statusa | ||||
| Not poor | 1,386 | 4.8 (3.8, 6.1) | 1 | 1 |
| Poor | 1,976 | 6.9 (5.9, 8.1) | 1.43 (1.21, 1.69) | 1.33 (1.11, 1.58)b |
| Daily Hours Without Water | ||||
| 0 | 2,432 | 5.8 (4.9, 6.8) | 1 | 1 |
| 1–7 | 486 | 6.2 (4.2, 8.7) | 1.07 (0.85, 1.34) | 1.07 (0.85, 1.34)b |
| ≥ 8 | 444 | 7.7 (5.4, 10.5) | 1.33 (1.06, 1.65) | 1.31 (1.05, 1.63)b |
| Per additional person in the household | - | - | 0.97 (0.95, 0.99) | 0.96 (0.95, 0.98)c |
Estimates in bold are statistically significant (p<0.05).
aSocioeconomic status was evaluated using survey information on possessions, conditions of the home, and crowding provided by the participants or their parents/guardians.
bEstimates from a multivariate model including all variables except persons in the household.
cEstimate from a multivariate model including all variables except SES.