Table 2. Factors associated with timeliness of yellow fever surveillance, Central African Republic, 2007–2012*.
| Factor | Mean timeliness, d | Adjusted time ratio (95% CI) | p value† |
|---|---|---|---|
| Age, y | |||
| <14 | 15.3 | 1.00 | NA |
| 15–24 | 16.5 | 1.13 (1.08–1.18) | NA |
| 25–34 | 16.8 | 1.15 (1.09–1.21) | NA |
| ≥35 |
18.6 |
1.21 (1.15–1.27) |
<0.001 |
| Sex | |||
| M | 16.6 | 1.00 | NA |
| F |
16.5 |
1.01 (0.98–1.05) |
0.43 |
| Onset during rainy season | |||
| No | 16.7 | 1.00 | NA |
| Yes |
16.5 |
1.01 (0.97–1.04) |
NA |
| Province of residence | |||
| Bangui | 14.8 | 1.00 | NA |
| Ombella M’Poko | 15.7 | 1.07 (1.02–1.12) | NA |
| Lobaye | 16.8 | 1.18 (1.09–1.28) | NA |
| Sangha Mbaéré | 17.6 | 1.17 (0.93–1.46) | NA |
| Mambéré Kadéi | 18.0 | 1.21 (1.03–1.41) | NA |
| Nana Mambéré | 20.7 | 1.43 (1.22–1.67) | NA |
| Ouham Péndé | 15.5 | 1.10 (1.01–1.19) | NA |
| Ouham | 17.0 | 1.19 (1.08–1.32) | NA |
| Nana Grigbizi | 22.9 | 1.56 (1.39–1.77) | NA |
| Kemo | 19.4 | 1.35 (1.21–1.51) | NA |
| Bamingui Bangoran | 17.5 | 1.24 (1.01–1.53) | NA |
| Ouaka | 19.2 | 1.34 (1.24–1.46) | NA |
| Basse Kotto | 16.5 | 1.19 (1.10–1.29) | NA |
| Vakaga | 20.1 | 1.38 (1.16–1.65) | NA |
| Haute Kotto | 17.4 | 1.25 (1.13–1.39) | NA |
| Mbomou | 26.2 | 1.86 (1.66–2.09) | NA |
| Haut Mbomou |
23.9 |
1.72 (1.37–2.15) |
<0.001 |
| Vaccination against yellow fever | |||
| Never | 16.6 | 1.00 | NA |
| >10 y ago | 16.9 | 1.01 (0.93–1.09) | NA |
| ≤10 y ago | 16.3 | 1.01 (0.96–1.05) | NA |
| Unknown date |
16.1 |
1.06 (0.92–1.23) |
0.85 |
| Year of onset | |||
| 2007 | 17.8 | 1.00 | NA |
| 2008 | 17.3 | 1.02 (0.95–1.09) | NA |
| 2009 | 14.7 | 0.91 (0.85–0.98) | NA |
| 2010 | 16.8 | 1.04 (0.97–1.12) | NA |
| 2011 | 17.8 | 1.10 (1.02–1.18) | NA |
| 2012 | 16.6 | 1.05 (0.96–1.15) | <0.001 |
*Adjusted time ratios are from a parametric survival model assuming log-normal distribution of the event times. A time ratio represents a relative increase in time between 2 groups. Timeliness was defined as the delay between the date of onset of jaundice (reported by the patient) and the date of ELISA result. NA, not applicable. †By global Wald test.