Table 2.
Univariate and multivariate logistic regression of characteristics for association with vaccination status.
| Univariate logistic regression analysis | 95% CI for OR | Multivariate logistic regression analysis*** | 95% CI for OR | |||||
|---|---|---|---|---|---|---|---|---|
| OR | Lower | Upper | Value of p | OR | Lower | Upper | Value of p | |
| Sociodemographic variables | ||||||||
| Age in years | ||||||||
| 25–39 | Ref. | |||||||
| 40–49 | 1.024 | 0.789 | 1.328 | 0.859 | ||||
| 50–59 | 0.926 | 0.715 | 1.198 | 0.558 | ||||
| 60–69 | 0.930 | 0.697 | 1.240 | 0.621 | ||||
| 70–79 | 0.713 | 0.472 | 1.074 | 0.107 | ||||
| 80+ | 0.523 | 0.249 | 1.056 | 0.076 | ||||
| Missing* | ||||||||
| Educational attainment | ||||||||
| Undergraduate | Ref. | |||||||
| Postgraduate | 1.151 | 0.900 | 1.474 | 0.264 | ||||
| High school and below | 0.870 | 0.744 | 1.016 | 0.078 | ||||
| Monthly household income per capita, yuan | ||||||||
| 2,000–5,000 | Ref. | |||||||
| <2000 | 1.063 | 0.773 | 1.461 | 0.707 | ||||
| 5,000-10,000 | 1.173 | 0.981 | 1.403 | 0.081 | ||||
| >10,000 | 1.282 | 1.062 | 1.548 | 0.010 | ||||
| Administrative regions | ||||||||
| East | Ref. | |||||||
| North | 0.977 | 0.749 | 1.274 | 0.861 | ||||
| Northeast | 1.131 | 0.788 | 1.624 | 0.505 | ||||
| Central | 1.063 | 0.636 | 1.780 | 0.815 | ||||
| South | 2.090 | 0.894 | 5.291 | 0.100 | ||||
| Southwest | 0.605 | 0.232 | 1.489 | 0.283 | ||||
| Northwest | 0.894 | 0.512 | 1.558 | 0.693 | ||||
| Living area | ||||||||
| Urban | Ref. | |||||||
| Rural | 1.023 | 0.765 | 1.369 | 0.879 | ||||
| Work status | ||||||||
| Unemployed | Ref. | Ref. | ||||||
| Employed | 1.363 | 1.062 | 1.751 | 0.015 | 1.783 | 1.118 | 2.842 | 0.015 |
| Retired | 0.866 | 0.675 | 1.110 | 0.256 | 1.049 | 0.661 | 1.666 | 0.839 |
| Student | 2.121 | 0.201 | 45.916 | 0.541 | 390185542.547 | 0.000 | . | 1.000 |
| Have children under age 18 | ||||||||
| No | Ref. | |||||||
| Yes | 0.861 | 0.740 | 1.001 | 0.051 | ||||
| Health and disease status | ||||||||
| Self-perceived health | ||||||||
| Bad | Ref. | |||||||
| General | 0.448 | 0.244 | 0.797 | 0.007 | ||||
| Good | 0.536 | 0.296 | 0.940 | 0.034 | ||||
| Recent breast cancer-related treatment | ||||||||
| Cytotoxic therapy** | Ref. | Ref. | ||||||
| Endocrine therapy | 0.478 | 0.400 | 0.570 | <0.001 | 0.531 | 0.376 | 0.749 | <0.001 |
| Traditional Chinese medicine | 0.489 | 0.313 | 0.757 | 0.001 | 0.932 | 0.389 | 2.233 | 0.875 |
| No treatment | 0.858 | 0.697 | 1.055 | 0.147 | 1.124 | 0.745 | 1.693 | 0.578 |
| Missing* | ||||||||
| Time after surgery | ||||||||
| <1 year | Ref. | Ref. | ||||||
| 1–3 years | 0.263 | 0.210 | 0.329 | <0.001 | 0.277 | 0.176 | 0.436 | <0.001 |
| 3–5 years | 0.292 | 0.228 | 0.373 | <0.001 | 0.277 | 0.170 | 0.451 | <0.001 |
| > = 5 years | 0.340 | 0.270 | 0.427 | <0.001 | 0.282 | 0.179 | 0.443 | <0.001 |
| Missing* | ||||||||
| History of food or drug allergies | ||||||||
| No | Ref. | Ref. | ||||||
| Yes | 0.529 | 0.442 | 0.632 | <0.001 | 0.579 | 0.417 | 0.804 | 0.001 |
| History of other vaccine allergies | ||||||||
| No | Ref. | |||||||
| Yes | 0.317 | 0.211 | 0.467 | <0.001 | ||||
| Stage at diagnosis | ||||||||
| 0 | Ref. | Ref. | ||||||
| I | 3.214 | 2.255 | 4.598 | <0.001 | 2.008 | 1.124 | 3.590 | 0.019 |
| II | 1.130 | 0.803 | 1.594 | 0.485 | 1.062 | 0.637 | 1.772 | 0.817 |
| III | 0.947 | 0.666 | 1.349 | 0.760 | 0.801 | 0.472 | 1.360 | 0.411 |
| IV | ||||||||
| Missing* | ||||||||
| Histology | ||||||||
| Carcinoma in situ | Ref. | |||||||
| Invasive ductal carcinoma | 0.893 | 0.682 | 1.167 | 0.408 | ||||
| Invasive lobular carcinoma | 1.134 | 0.673 | 1.923 | 0.639 | ||||
| Others | 0.927 | 0.626 | 1.371 | 0.704 | ||||
| Missing* | ||||||||
| Histological grade | ||||||||
| G1 | Ref. | |||||||
| G2 | 1.129 | 0.841 | 1.518 | 0.420 | ||||
| G3 | 1.159 | 0.847 | 1.586 | 0.358 | ||||
| Missing* | ||||||||
| Molecular subtype | ||||||||
| Luminal A | Ref. | |||||||
| Luminal B | 0.884 | 0.714 | 1.095 | 0.259 | ||||
| HER2 over-expression subtype | 0.945 | 0.657 | 1.360 | 0.762 | ||||
| Basal-like | 0.985 | 0.702 | 1.385 | 0.933 | ||||
| Missing* | ||||||||
| Variables related to COVID-19 | ||||||||
| History of COVID-19 infection | ||||||||
| No | Ref. | |||||||
| Yes, no symptoms | 0.991 | 0.039 | 25.078 | 0.995 | ||||
| Yes, mild symptoms | 0.991 | 0.183 | 5.363 | 0.991 | ||||
| Yes, severe symptoms | 1.321 | 0.291 | 6.719 | 0.716 | ||||
| Worried about infection | ||||||||
| No | Ref. | |||||||
| Yes | 1.094 | 0.933 | 1.282 | 0.270 | ||||
| Have you consulted healthcare workers about COVID-19 vaccines? | ||||||||
| No | Ref. | |||||||
| Yes, my questions were answered. | 1.035 | 0.881 | 1.215 | 0.676 | ||||
| Yes, my questions were not answered. | 0.803 | 0.651 | 0.989 | 0.039 | ||||
| Think vaccines can provide protection | ||||||||
| No | Ref. | Ref. | ||||||
| Yes | 1.549 | 1.285 | 1.867 | <0.001 | 1.774 | 1.170 | 2.690 | 0.007 |
| Perceptions on vaccine safety | ||||||||
| General | Ref. | Ref. | ||||||
| Safe | 1.719 | 1.459 | 2.027 | <0.001 | 2.074 | 1.513 | 2.843 | <0.001 |
| Very safe | 2.963 | 2.229 | 3.967 | <0.001 | 4.251 | 2.452 | 7.369 | <0.001 |
| Not safe | 1.506 | 1.145 | 1.980 | 0.003 | 2.075 | 1.185 | 3.635 | 0.011 |
| Very unsafe | 5.024 | 3.038 | 8.699 | <0.001 | 5.609 | 1.807 | 17.407 | 0.003 |
Values in red indicates these are statistically significant
OR, odds ratio; CI, confidence interval.
*
Missing values were not included for statistical analysis.
**
Chemotherapy/radiotherapy/targeted therapy, with/without endocrine therapy or traditional Chinese medicine.
***
Intercept = 0.15 (p = 0.722); Cox & Snell R Square = 0.192; Nagelkerke R Square = 0.256.