FIG. 4.

Univariate association of preoperative factors with pain outcomes. Factors significantly associated with at least one of the four main pain outcome types are shown, with factors associated with multiple outcomes falling within the overlapping areas. The top circles show the breast surgery-specific questionnaire (Breast Cancer Pain Questionnaire [BCPQ]) outcomes, and the bottom circles show the general pain questionnaire (BPI) outcomes. The circles on the left show the pain severity outcomes, and the circles on the right show the pain impact measures. ↑, higher value associated with higher pain; ↓, lower value associated with higher pain; ALND, axillary lymph node dissection; BMI, body mass index; SLNB, sentinel lymph node biopsy