Table 3.
Predictors of off-label high-dose influenza vaccine use among adults aged 18–64 y, 2010–2012
| % High-dose influenza vaccine | % Standard influenza vaccine | Multivariable adjusted OR (95% CI) | |
|---|---|---|---|
| Total (N) | 31,989 | 8,608,982 | |
| Age | |||
| 18–35 | 16.8 | 19.0 | 0.83 (0.80, 0.87) |
| 36–50 | 27.7 | 30.7 | 0.83 (0.81, 0.86) |
| 51–64 | 55.5 | 50.3 | Reference |
| Male sex | 44.5 | 41.2 | 1.08 (1.05, 1.10) |
| Physician type | |||
| Family practice doctor | 27.6 | 36.1 | 0.62 (0.61, 0.64) |
| Internal medicine doctor | 25.3 | 20.0 | Reference |
| Other | 14.8 | 14.1 | 0.92 (0.89, 0.96) |
| Specialist | 15.7 | 13.7 | 1.01 (0.98, 1.05) |
| Hospital doctor | 1.3 | 1. | 0.55 (0.50, 0.60) |
| Nurse | 0.6 | 3.2 | 0.17 (0.14, 0.19) |
| Pharmacist | 0.5 | 4.8 | 0.08 (0.07, 0.10) |
| Region | |||
| Northeast | 17.6 | 22.0 | Reference |
| North central | 34.2 | 24.9 | 1.45 (1.40, 1.50) |
| South | 34.6 | 34.5 | 1.40 (1.35, 1.44) |
| West | 12.0 | 16.6 | 0.98 (0.94, 1.03) |
| Unknown | 1.6 | 2.0 | 0.98 (0.90, 1.08) |
| Immune related comorbidities | |||
| Immunesuppression (HIV, cancer, autoimmune, transplant) | 13.4 | 10.5 | 1.23 (1.18, 1.27) |
| Heart disease* | 13.1 | 9.1 | 1.30 (1.25, 1.35) |
| Chronic liver disease | 1.8 | 1.4 | 1.08 (0.99, 1.18) |
| Chronic lung disease | 11.4 | 8.9 | 1.25 (1.20, 1.29) |
| Other comorbidities | |||
| Diabetes | 19.0 | 14.1 | 1.28 (1.24, 1.32) |
| Hypertension | 34.2 | 28.2 | 1.17 (1.14, 1.21) |
*IHD or MI