Table 3 Multiple logistic regression analysis
Factor | OR estimate | OR 95% CI | p-value | |
|---|---|---|---|---|
Time using the current method, months (continuous variable) | 1.006 | 1.004–1.008 | <0.0001 | |
Contraceptive method | Pill vs vaginal ring | 4.175 | 3.683–4.732 | <0.0001 |
Patch vs vaginal ring | 1.648 | 1.362–1.994 | ||
Pill vs Patch | 2.534 | 2.128–3.016 | ||
Information on treatment | Not very informed | 1.931 | 1.336–2.791 | <0.0001 |
(reference: very informed) | Normal | 1.532 | 1.370–1.713 | |
Interest in not becoming pregnant | Very interested | 1.161 | 1.012–1.332 | <0.0001 |
(reference: interested) | Prefer not to get pregnant | 1.273 | 1.057–1.534 | |
Not mind | 1.455 | 1.001–2.117 | ||
Partner support | Absence of partner | 1.415 | 1.195–1.676 | <0.0001 |
(reference: always reminding) | Indifferent | 1.416 | 1.205–1.664 | |
Sometimes | 1.372 | 1.214–1.550 | ||
Understanding of information and instructions | Not interested | 2.137 | 0.182–25.052 | 0.0089 |
(reference: complete understanding) | Anything | 1.066 | 0.283–4.014 | |
Not understanding a lot of things | 1.696 | 1.213–2.371 | ||
Understanding almost all | 1.167 | 1.032–1.318 | ||
Belief that participation would avoid forgetfulness/delays | More vs The same | 1.072 | 0.865–1.329 | <0.0001 |
Less vs The same | 1.298 | 1.167–1.444 | ||
Less vs More | 1.211 | 0.977–1.501 | ||
Routine method | Other | 1.142 | 0.902–1.447 | <0.0001 |
(reference: at the same hour each day of the week/month) | Not interested | 1.470 | 1.003–2.154 | |
Considered but not organized | 3.873 | 2.997–5.004 | ||
Activity reminding treatment | 0.846 | 0.740–0.968 | ||
Difficulties remembering to take/use/remove the contraceptive method | During the week, from Monday to Friday | 6.189 | 4.982–7.687 | <0.0001 |
(reference: none) | On vacation | 2.132 | 1.851–2.455 | <0.0001 |
On weekend | 3.392 | 2.934–3.921 | <0.0001 | |
On short trips | 1.563 | 1.306–1.871 | <0.0001 | |
Going out the night before | 2.099 | 1.762–2.501 | <0.0001 | |
Travelling to a different time zone | 1.403 | 1.106–1.780 | <0.0001 | |