7033 Background: Shared decision making to confront choices with clinical equipoise, has been the privilege of those patients with access to time intensive consults with oncologists. We conducted a randomized controlled trial for breast cancer patients to use an online, self-administered, out-of-the-medical-encounter decision aid (DA) to choose between breast conserving surgery (BCS) and mastectomy. Methods: Navya Patient Preference Tool (Navya PPT) is a multilingual DA based on adaptive conjoint analysis of tradeoffs between cost, adverse effects of radiation, and breast conservation. Prior analysis established high internal reliability and external validity of the Navya PPT. Eligible cT1/2, cN0 breast cancer patients planned for surgery were block randomized, in 1:1:1 ratio, to receive the research questionnaire (RQ) to measure decisional conflict on choice of surgery (control, arm 1), Navya PPT followed by RQ (experimental, arm 2) or Navya PPT followed by RQ administered with key male family member (experimental, arm 3). Groups were stratified with respect to age, socio-economic status (SES) and educational level. The study was powered to detect a decrease in Decisional Conflict Index (DCI) by 0.25 (β-0.8, two sided α- 0.01). Results: Between June 2017 and December 2019, 247/255 patients were randomized to arm 1 (83), arm 2 (84), and arm 3 (80). Median age was 48 years (IQR 23-76), and median pT size was .5 cm (0.5-6 cm). 59% of patients were middle or lower SES and 46.2% had ≤ 12th grade education. DCI was significantly reduced in arm 2 as compared with arm 1 (1.34 vs. 1.65, Cohen’s d 0.49 (± 0.31) p<0.05) as well as in arm 3 as compared with arm 1 (1.30 vs. 1.65, Cohen’s d 0.54 (± 0.31) p<0.05). 80% (± 6%) of patients underwent surgery of choice as determined by Navya PPT. BCS rate was similar in all three arms (85.2, 88.9 and 86.5% respectively (p=0.779). Conclusions: Online, self-administered, adaptive DAs used out of the medical encounter can reduce decisional conflict and increase access to shared decision making for every patient; especially in practices with low doctor to patient ratios. Clinical trial information: IEC/0116/1619/001 .
A culturally adapted survivorship programme for Asian early stage breast cancer patients in Singapore: A randomized, controlled trial
