Table 2.
Demographic characteristics of the study population by the confirmed 2009–2010 monovalent H1N1 influenza vaccine status at enrollment and at the end of the season in April 2010.
| Demographic characteristic | Enrolled | H1N1 Influenza Vaccination Status | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| At enrollment, N (%) | At end of season, N (%) | |||||||||
| Frequency Count | None | Partial | Full | p-value | None | Partial | Full | p-value | ||
| All | 297 | 244 (82%) | 35 (12%) | 18 (6%) | 214 (72%) | 42 (14%) | 41 (14%) | |||
| Age group | 6 mos to 4 yrs | 174 | 136 (78%) | 29 (17%) | 9 (5%) | 0.012† | 115 (66%) | 33 (19%) | 26 (15%) | 0.016† |
| 5 to 9 yrs | 76 | 63 (83%) | 6 (8%) | 7 (9%) | 59 (78%) | 9 (12%) | 8 (11%) | |||
| 10 to 17 yrs | 47 | 45 (96%) | N/A | 2 (4%) | 40 (85%) | N/A | 7 (15%) | |||
| Gender | Female | 142 | 115 (81%) | 18 (13%) | 9 (6%) | 0.871 | 98 (69%) | 23 (16%) | 21 (15%) | 0.515 |
| Male | 155 | 129 (83%) | 17 (11%) | 9 (6%) | 116 (75%) | 19 (12%) | 20 (13%) | |||
| Race/Ethnicity | Hispanic | 60 | 37 (62%) | 14 (23%) | 9 (15%) | <.001 | 25 (42%) | 18 (30%) | 17 (28%) | <.001 |
| Black | 159 | 139 (87%) | 16 (10%) | 4 (3%) | 129 (81%) | 17 (11%) | 13 (8%) | |||
| White | 77 | 67 (87%) | 5 (6%) | 5 (6%) | 60 (78%) | 6 (8%) | 11 (14%) | |||
| Admitted to the hospital | No | 226 | 188 (83%) | 24 (11%) | 14 (6%) | 0.503 | 170 (75%) | 29 (13%) | 27 (12%) | 0.075 |
| Yes | 70 | 55 (79%) | 11 (16%) | 4 (6%) | 43 (61%) | 13 (19%) | 14 (20%) | |||
| Month of enrollment | Sept–Oct 2009 | 41 | 41 (100%) | 0 (0%) | 0 (0%) | 0.002 | 26 (63%) | 4 (10%) | 11 (27%) | 0.316 |
| Nov–Dec 2009 | 91 | 76 (84%) | 13 (14%) | 2 (2%) | 69 (76%) | 13 (14%) | 9 (10%) | |||
| Jan–Feb 2010 | 115 | 90 (78%) | 13 (11%) | 12 (10%) | 82 (71%) | 17 (15%) | 16 (14%) | |||
| Mar–Apr 2010 | 50 | 37 (74%) | 9 (18%) | 4 (8%) | 37 (74%) | 8 (16%) | 5 (10%) | |||
| Hish-risk medical condition* | No | 181 | 151 (83%) | 20 (11%) | 10 (6%) | 0.749 | 135 (75%) | 25 (14%) | 21 (12%) | 0.348 |
| Yes | 116 | 93 (80%) | 15 (13%) | 8 (7%) | 79 (68%) | 17 (15%) | 20 (17%) | |||
| Insurance | Private | 44 | 38 (86%) | 4 (9%) | 2 (5%) | 0.784 | 31 (70%) | 5 (11%) | 8 (18%) | 0.646 |
| Public | 243 | 196 (81%) | 31 (13%) | 16 (7%) | 174 (72%) | 37 (15%) | 32 (13%) | |||
| None | 10 | 10 (100%) | 0 (0%) | 0 (0%) | 9 (90%) | 0 (0%) | 1 (10%) | |||
*
High-risk medical conditions include cancer, diabetes mellitus, heart disease, immune deficiency, kidney disease, liver disease, sickle cell disease, seizure disorder, cognitive impairment or developmental delay, asthma, cystic fibrosis, and chronic lung disease.
Note: Statistically significant results as determined by Fisher’s exact tests are highlighted with gray background.
†
Because partial vaccination is not possible for the oldest age group, we compared no vaccination to partial or full vaccination for age group only using the Fisher’s exact tests.