Supplemental Material: Shared decision making quality and decisional regret in patients with low-risk superficial basal cell carcinoma: a prospective, multicenter cohort study.

Supplemental Table I. Qualitative Decisional Conflict according to age
Supplemental Table II. Qualitative Decisional Conflict according to marital status
Supplemental Table III. Decisional conflict scores according to treatment decision
Supplemental Table IV. Decisional conflict scores according to tumour´s localization
Supplemental Table V. Selected treatment according to tumour´s localization
Supplemental Figure I. Visual SDM-decisional aid-tool

Abstract
Background: Many therapies are available to treat low-risk superficial Basal Cell Carcinoma (lr-sBCC), which may complicate the shared decision-making (SDM) process.
Objective: To assess the SDM process of patients and physicians when deciding lr-sBCC therapy, as well as the factors that may influence the SDM process.
Methods: A prospective, multicenter cohort study over 18-months from October 2018 to April 2020 on three tertiary university hospitals and one private hospital.
Results: This study included 107 patients. There was a weak positive correlation between SDM-Q-9 and SDM-Q-Doc (rs [105] = 0.21; P = .03). Most patients (71%) chose a non-surgical treatment after the SDM process. Patients with higher satisfaction with the SDM had lower decisional conflict and decisional regret (P < .001). Patients older than 80 years had higher rates of significant decisional conflict. When evaluating treatment decisions, the highest median score on decisional conflict (22, IQR [16]; P = .01) was observed on patients who chose a surgical excision.
Limitations: Patients may have self‐selected to participate.

Conclusion: This study suggests that patients may prefer less invasive therapies for low-risk superficial basal cell carcinoma. The shared decision-making process may reduce decisional conflict and decisional regret.