Table 1. Demographic characteristics and history of yellow fever vaccination of participants aged 60 years or more (Group 1) and under-60 years (Group 2).
| Group 1 (≥ 60 y) n=46 no (%) | Group 2 (18 - 59 y) n=48 no (%) | p-value | |
| Age | |||
| Mean (SD) Median (min - max) | 70.0 (6.5) 68.5 (60 - 85) | 35.6 (9.9) 33.0 (20 - 58) | - |
| Gender | |||
| Female | 30 (65.2) | 37 (77.1) | 0.204 |
| Race | |||
| Caucasian African Asian Indigenous | 30 (65.2) 10 (21.7) 5 (10.9) 1(2.2) | 38 (79.2) 6 (12.6) 4 (8.3) 0 (0.0) | 0.131* |
| Number of previous doses of Yellow Fever vaccine (n =76)** | |||
| 1 ≥2 Unknown (≥1) | 23 (50.0) 10 (21.7) 13 (28.3) | 36 (75.0) 7 (14.6) 5 (10.4) | 0.146 |
| Time elapsed since last dose (months) (n=93)# | |||
| Mean (SD) Median (min - max) | 60.9 (52.3) 40.0 (3.4 - 232.3) | 80.2 (57.1) 69.3 (1.7 - 246.3) | 0.108 |
| Age at last vaccination (n=93)# | |||
| Mean (SD) Median (min-max) | 65.3 (7.0) 64.9 (50.0 - 83.1) | 29.3 (9.8) 27.6 (10.6 - 54.5) | |
| Time elapsed since last vaccination | |||
| <10 years >10 years | 36 (78.3) 10 (21.7) | 34 (70.8) 14 (29.2) | |
*Analysis comparing caucasian and non-caucasian persons. ** Analysis excluded persons that did not know how many doses they received. # One person was excluded of the analysis because she did not know when she received the vaccine.