Table 3. Univariate logistic regression analysis with dichotomous BDI outcome.

Variable	OR	95% CI	P value
Type of operation	0.585	0.265–1.289	0.183
Age (quartiles)
36.8–56.3	–	–	–
56.4–64.6	1.078	0.429–2.704	0.874
64.7–75.6	0.753	0.297–1.907	0.549
75.7–95.0	1.509	0.591–3.851	0.389
Mean years in follow-up	1.103	0.989–1.230	0.078
Type of household	1.959	0.992–3.869	0.053
Children	1.588	0.783–3.220	0.200
Highest level of education
Low	–	–	0.011
Intermediate	3.485	1.539–7.893	0.003
High	2.385	0.908–6.260	0.078
Body mass index (quartiles)
16.0–23.3	–	–	–
23.4–25.7	1.143	0.483–2.981	0.785
25.8–29.1	0.950	0.360–2.509	0.918
29.2–44.4	2.192	0.825–5.825	0.115
Comorbidities (yes/no)	3.347	1.640–6.834	0.001
Polypharmacy	2.367	1.097–5.110	0.028
Radiotherapy	1.350	0.676–2.696	0.395
Chemotherapy	0.883	0.446–1.738	0.720
Hormonal/endocrine therapy	1.762	0.897–3.461	0.100

BDI, Beck Depression Inventory; OR, odds ratio; CI, confidence interval.