Table 2. Multivariate logistic analysis to characterize factors associated with different outcomes of interest.
| Variable | OR | SE | 95% CI | p value | |
|---|---|---|---|---|---|
| Model 1. Knowledge that influenza is preventable by vaccine and that patients with chronic disease are at higher risk of developing severe forms of influenza(no = 0; yes = 1) | |||||
| Log likelihood = -424.31, χ2 = 43.38 (7 df), p< 0.0001 (sample size = 689) | |||||
| Educational level | |||||
| Middle school or lower | 0.38 | 0.11 | 0.21–0.67 | 0.001 | |
| High school | 0.42 | 0.12 | 0.24–0.75 | 0.003 | |
| College degree or higher | 1.0* | - | - | - | |
| Age | |||||
| 18–49 | 0.6 | 0.12 | 0.4–0.9 | 0.013 | |
| ≥65 | 1.0* | - | - | - | |
| Perception of personal health status (poor = 0; good = 1) | 0.63 | 0.12 | 0.44–0.92 | 0.017 | |
| Model 2. Positive attitude towards the utility of influenza vaccination (no = 0; yes = 1) | |||||
| Log likelihood = -356.16, χ2 = 37.86 (10 df), p<0.001(sample size = 622) | |||||
| Information about influenza vaccine from physician (no = 0; yes = 1) | 2.18 | 0.44 | 1.47–3.23 | <0.0001 | |
| Educational level | |||||
| High school | 1.59 | 0.32 | 1.07–2.37 | 0.021 | |
| College degree or higher | 1.0* | - | - | - | |
| Model 3. Had received influenza vaccination in the last season (no = 0; yes = 1) | |||||
| Log likelihood = -301.37, χ2 = 257.11 (11 df), p<0.001 (sample size = 628) | |||||
| Age | |||||
| 18–49 | 0.21 | 0.74 | 0.11–0.42 | <0.0001 | |
| 50–64 | 0.3 | 0.72 | 0.18–0.48 | <0.0001 | |
| ≥65 | 1.0* | - | - | - | |
| Information about influenza vaccine from physician (no = 0; yes = 1) | 3.11 | 0.64 | 2.08–4.67 | <0.0001 | |
| Awareness of usefulness of influenza vaccine (no = 0; yes = 1) | 7.21 | 1.96 | 4.23–12.28 | <0.0001 | |
| Attitude towards the dangers of influenza vaccination (negative = 0; positive = 1) | 0.2 | 0.05 | 0.12–0.34 | <0.0001 | |
| Patients with chronic respiratory diseases (no = 0; yes = 1) | 1.72 | 0.37 | 1.13–2.61 | 0.011 | |
| Number of drugs taken (≤4 = 0; ≥5 = 1) | 1.69 | 0.36 | 1.1–2.6 | 0.015 | |
| Knowledge that influenza is preventable by vaccine and that patients with chronic disease are at higher risk of developing severe forms of influenza (no = 0; yes = 1) | 1.63 | 0.36 | 1.06–2.51 | 0.026 | |
| Have a longer length of disease (≤4 years = 0; ≥5 years = 1) | 1.64 | 0.41 | 1.01–2.69 | 0.047 | |
| Model 4. Willingness to receive influenza vaccination in the next season (no = 0; yes = 1) | |||||
| Log likelihood = -287.43, χ2 = 294.64 (13df), p<0.001 (sample size = 628) | |||||
| Awareness of usefulness of influenza vaccine (no = 0; yes = 1) | 9.97 | 2.78 | 5.77–17.2 | <0.0001 | |
| Attitude towards the dangers of influenza vaccination (negative = 0;positive = 1) | 0.13 | 0.04 | 0.08–0.24 | <0.0001 | |
| Information about influenza vaccine from physician (no = 0; yes = 1) | 2.89 | 0.63 | 1.88–4.44 | <0.0001 | |
| Age | |||||
| 18–49 | 0.31 | 0.1 | 0.16–0.62 | 0.001 | |
| 50–64 | 0.29 | 0.07 | 0.18–0.48 | <0.0001 | |
| ≥65 | 1.0* | - | - | - | |
| Knowledge that influenza is preventable by vaccine and that patients with chronic disease are at higher risk of developing severe forms of influenza (no = 0; yes = 1) | 1.94 | 0.43 | 1.25–3.01 | 0.003 | |
| Perception of risk of contracting influenza (low = 0; high = 1) | 1.92 | 0.04 | 1.2–3.1 | 0.007 | |
| Patients with chronic respiratory diseases (no = 0; yes = 1) | 1.79 | 0.39 | 1.15–2.77 | 0.009 | |
| Number of drugs taken (≤4 = 0; ≥5 = 1) | 1.74 | 0.44 | 1.05–2.87 | 0.031 | |
*Reference category in multivariate analysis