Impacts of Clinician-Mediated Report-Back

Primary outcomes

1. Knowledge Before and After Report-back Intervention.

   Time frame: Participants completed pre and post-surveys before and at least 2 weeks after report-back up to a maximum of 6 weeks.

   Participants were asked to respond to a series of 9-11 statements about environmental exposures and select if they were true, probably true, probably false, or false. Responses were re-coded to indicate correctness, and index score was calculated as the fraction of correct responses across all questions for each participant (0-1).

   Pre-survey knowledge indices were subtracted from post-survey indices to calculate the change after report-back (i.e., pre-post-survey change in knowledge is reported below). A larger reported mean below would indicate that report-back mode resulted in a larger knowledge gain (a better outcome).

2. Satisfaction With Report-back After Report-back Intervention

   Time frame: Participants completed post-surveys at least 2 weeks after report-back up to a maximum of 6 weeks.

   Participants were asked to rank their agreement with four satisfaction questions at the post-survey using a Likert-scale from 1 (strongly disagree) to 5 (strongly agree). Responses to all four questions were summed to calculate post-report-back sum satisfaction from 4-20. A higher score indicates more satisfaction (a better outcome).

3. Feelings About Report-back, Before and After Intervention

   Time frame: Participants completed pre and post-surveys before and at least 2 weeks after report-back up to a maximum of 6 weeks.

   Participants ranked the strength of each feeling using a Likert-scale from 1 (not at all) to 6 (very strong). Pre-survey responses were subtracted from post-survey responses to calculate the change after report-back. A higher score for outcomes measures such as empowered and respected indicates a better outcome.

4. Perceived Self-efficacy Before and After Report-back Intervention

   Time frame: Participants completed pre and post-surveys before and at least 2 weeks after report-back up to a maximum of 6 weeks.

   Participants were asked to respond to a series of seven statements and rate confidence in their abilities using a Likert-scale from 0 (cannot do it at all) to 6 (highly certain I can do it). Responses to all seven questions were summed to calculate a perceived self-efficacy scale from 0-42. Pre-survey scales were subtracted from post-survey scales to calculate the change after report-back. A higher scores indicates a better outcome.

5. Behaviors Before and After Report-back Intervention

   Time frame: Participants completed pre and post-surveys before and at least 2 weeks after report-back up to a maximum of six weeks.

   Participants were asked to rate how frequently they engaged in exposure-related behaviors during the previous two weeks using a Likert-scale from 0 (never) to 3 (Always/almost every day). Pre-survey responses were subtracted from post-survey responses to calculate the change after report-back. A higher score indicates a better outcome for questions such as 'look for information about chemical ingredients', whereas a lower score indicates a better outcome for questions such as 'microwave food in plastic containers.'