Factors associated with a preference for branded medicines
| Variable | B | Wald | OR | P values | 95% CI for OR |
| Age | 0.04 | 10.66 | 1.04 | 0.001 | 1.01 to 1.05 |
| Gender | −0.16 | 0.21 | 0.86 | 0.647 | 0.44 to 1.67 |
| Education level | −0.23 | 0.68 | 0.80 | 0.411 | 0.46 to 1.37 |
| Ethnicity | 0.33 | 0.72 | 1.40 | 0.396 | 0.65 to 3.01 |
| Preswitch medication type | 0.71 | 5.55 | 2.02 | 0.019 | 1.13 to 3.64 |
| Time on previous brand | 0.00 | 0.00 | 1.00 | 0.961 | 0.86 to 1.18 |
| Perceived efficacy of old brand | 0.11 | 2.97 | 1.11 | 0.085 | 0.99 to 1.25 |
| Perceived efficacy of new generic | 0.00 | 0.01 | 1.00 | 0.940 | 0.92 to 1.10 |
| Perceived sensitivity to medicines | 0.11 | 14.17 | 1.12 | <0.001 | 1.06 to 1.19 |
| Trust in pharmaceutical agencies | −0.02 | 1.60 | 0.98 | 0.206 | 0.95 to 1.01 |
| Look up medicine information on internet | 0.03 | 0.34 | 1.03 | 0.560 | 0.93 to 1.14 |