Table 2.
Results of the logistic regression analysis of respondents and nonrespondents (n = 3,312)
| Independent variablea | Odds ratio (95% confidence interval) | p value |
|---|---|---|
| Age group (reference ‘60–69 years’) | ||
| 18–39 years | 1.919 (01.111; 3.316) | 0.019 |
| 40–49 years | 1.008 (0.697; 1.459) | 0.965 |
| 50–59 years | 1.099 (0.807; 1.495) | 0.550 |
| 70–79 years | 1.325 (0.964; 1.822) | 0.083 |
| 80 years and older | 2.047 (1.308; 3.204) | 0.002 |
| UICC staging (reference ‘stage I’) | ||
| Stage 0 | 0.791 (0.426; 1.468) | 0.457 |
| Stage II | 1.309 (1.013; 1.691) | 0.040 |
| Stage III | 1.458 (1.026; 2.071) | 0.035 |
| Stage IV | 1.331 (0.811; 2.186) | 0.258 |
| ASA classification (reference ‘ASA 1’) | ||
| ASA 2 | 1.195 (0.929; 1.538) | 0.166 |
| ASA 3–5 | 1.947 (1.366; 2.776) | < 0.001 |
| Type of surgery (reference ‘breast conserving’) | ||
| Mastectomy | 1.351 (1.054; 1.733) | 0.018 |
a
Dependent variable: questionnaire returned (yes/no), reference category ‘yes’.