Characteristics by age group | Vaccinee | Non-vaccinee | P Value a |
---|---|---|---|
1–64 years | |||
N | 145,784 | 223,641 | |
Age (median [interquartile range]) | 14 [7, 39] | 22 [10, 43] | < 0.001 † |
Female | 64,914 (44.5%) | 98,589 (44.1%) | 0.008 * |
Vaccination in the 2012/2013 season | 91,541 (62.8%) | 20,050 (9.0%) | < 0.001 * |
Insured persons (vs dependents) b | 45,859 (31.5%) | 79,394 (35.5%) | < 0.001 * |
Number of children aged 0 to 15 years in a family (median [interquartile range]) c | 1 [0, 1] | 1 [0, 1] | < 0.001 † |
Before influenza season | |||
Number of outpatient visits | |||
During office hours (median [range]) | 2 [0–118] | 1 [0–112] | < 0.001 † |
Outside office hours (median [range]) | 0 [0–57] | 0 [0–61] | < 0.001 † |
Emergency hospitalization | 151 (0.1%) | 348 (0.2%) | < 0.001 * |
High-risk condition | 34,792 (23.9%) | 43,735 (19.6%) | < 0.001 * |
During influenza season | |||
Preceding onset of influenza in family members | 27,817 (19.1%) | 38,620 (17.3%) | < 0.001 * |
1–4 years | |||
N | 23,534 | 24,101 | |
Age (median [interquartile range]) | 3 [2, 4] | 2 [2, 3] | < 0.001 † |
Female | 11,387 (48.4%) | 11,809 (49.0%) | 0.184 * |
Vaccination in the 2012/2013 season | 14,561 (61.9%) | 2620 (10.9%) | < 0.001 * |
Insured persons (vs dependents) b | – | – | – |
Number of children aged 0 to 15 years in a family (median [interquartile range]) c | 1 [1, 1] | 1 [1, 1] | 0.005 † |
Before influenza season | |||
Number of outpatient visits | |||
During office hours (median [range]) | 5 [0–92] | 4 [0–65] | < 0.001 † |
Outside office hours (median [range]) | 0 [0–19] | 0 [0–16] | < 0.001 † |
Emergency hospitalization | 15 (0.1%) | 25 (0.1%) | 0.155 * |
High-risk condition | 7335 (31.2%) | 7451 (30.9%) | 0.552 * |
During influenza season | |||
Preceding onset of influenza in family members | 5095 (21.6%) | 5452 (22.6%) | 0.011 * |
5–12 years | |||
N | 43,535 | 50,247 | |
Age (median [interquartile range]) | 8 [6, 10] | 9 [7, 11] | < 0.001 † |
Female | 21,215 (48.7%) | 24,227 (48.2%) | 0.116 * |
Vaccination in the 2012/2013 season | 33,310 (76.5%) | 6118 (12.2%) | < 0.001 * |
Insured persons (vs dependents) b | – | – | – |
Number of children aged 0 to 15 years in a family (median [interquartile range]) c | 1 [1, 2] | 1 [1, 2] | < 0.001 † |
Before influenza season | |||
Number of outpatient visits | |||
During office hours (median [range]) | 3 [0–85] | 2 [0–73] | < 0.001 † |
Outside office hours (median [range]) | 0 [0–22] | 0 [0–53] | < 0.001 † |
Emergency hospitalization | 24 (0.1%) | 25 (0.05%) | 0.776 * |
High-risk condition | 10,193 (23.4%) | 9589 (19.1%) | < 0.001 * |
During influenza season | |||
Preceding onset of influenza in family members | 10,424 (23.9%) | 13,024 (25.9%) | < 0.001 * |
13–19 years | |||
N | 18,123 | 31,993 | |
Age (median [interquartile range]) | 14 [13, 15] | 15 [14, 16] | < 0.001 † |
Female | 8811 (48.6%) | 15,536 (48.6%) | 0.904 * |
Vaccination in the 2012/2013 season | 11,162 (61.6%) | 4862 (15.2%) | < 0.001 * |
Insured persons (vs dependents) b | 158 (0.9%) | 327 (1.0%) | 0.107 * |
Number of children aged 0 to 15 years in a family (median [interquartile range]) c | 1 [0, 1] | 1 [0, 1] | < 0.001 † |
Before influenza season | |||
Number of outpatient visits | |||
During office hours (median [range]) | 1 [0–74] | 1 [0–61] | < 0.001 † |
Outside office hours (median [range]) | 0 [0–20] | 0 [0–21] | < 0.001 † |
Emergency hospitalization | 15 (0.1%) | 47 (0.1%) | 0.066 * |
High-risk condition | 2219 (12.2%) | 3044 (9.5%) | < 0.001 * |
During influenza season | |||
Preceding onset of influenza in family members | 3479 (19.2%) | 6094 (19.0%) | 0.688 * |
20–64 years | |||
N | 60,591 | 117,019 | |
Age (median [interquartile range]) | 42 [35, 50] | 42 [34, 50] | < 0.001 † |
Female | 23,501 (38.8%) | 47,013 (40.2%) | < 0.001 * |
Vaccination in the 2012/2013 season | 32,508 (53.7%) | 6168 (5.3%) | < 0.001 * |
Insured persons (vs dependents) b | 45,701 (75.4%) | 78,797 (67.3%) | < 0.001 * |
Number of children aged 0 to 15 years in a family (median [interquartile range]) c | 0 [0, 2] | 0 [0, 1] | < 0.001 † |
Before influenza season | |||
Number of outpatient visits | |||
During office hours (median [range]) | 1 [0–118] | 1 [0–112] | < 0.001 † |
Outside office hours (median [range]) | 0 [0–57] | 0 [0–76] | < 0.001 † |
Emergency hospitalization | 96 (0.2%) | 250 (0.2%) | 0.013 * |
High-risk condition | 15,044 (24.8%) | 23,525 (20.1%) | < 0.001 * |
During influenza season | |||
Preceding onset of influenza in family members | 8819 (14.6%) | 13,929 (11.9%) | < 0.001 * |