CClinicalTrials.gg
CompletedNCT02522624Updated Feb 28, 2018Results posted

Supporting Decisions About Health Insurance to Improve Care for the Uninsured

An interventional study of Decision Aid (DA) in Health Literacy, Health Insurance and Health Services Accessibility, sponsored by Washington University School of Medicine. Completed at 1 site in United States. Open to participants aged 18 Years to 64 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-02-28.

Sponsored by Washington University School of Medicine · Not applicable, Interventional, and Prevention

Phase
Not applicable
Study type
Interventional
Enrollment
328
Allocation
Randomized
Ages
18 Years to 64 Years
Sex
All
01

Study summary

The overall purpose of the study is to better understand how the investigators previously developed decision support (DS) tool can help people make decisions about health insurance plans available through the federal exchanges created by the Affordable Care Act (ACA). The investigators will evaluate the DS tool compared to the federal government website. The investigators will also evaluate the feasibility of disseminating this tool. There are two primary aims to be completed in this project: (1) examine the reach and effectiveness of the health insurance DS tool; and (2) collect stakeholders' feedback to improve the likelihood of implementation of the DS tool.

Read the detailed description

First, for Aim 1 part 1, the investigators will recruit 40 key stakeholders (uninsured participants, health providers, community advisors, and health policy experts) to refine the DS tool through a series of individual semi-structured interviews. Next, the investigators will use their feedback to program the DS strategies into an online DS tool. After its initial production, the tool will be pilot tested with 30 individuals to assess readability, message clarity, format, and function of the tool as well as to test the randomized trial study procedures. Then, for Aim 1 part 2, the investigators will test the DS tool in a randomized trial with 362 participants eligible for the Affordable Care Act (ACA) exchanges. Half will use the DS tool and the other half will use the federal government site to learn about the exchanges. The investigators will use computerized random assignment to assign participants to study condition, after which they will all complete the same short survey. For Aim 2, the investigators will collect 40 stakeholders' feedback on likelihood of adoption and implementation of the DS tool to plan for dissemination and implementation. Stakeholders will be asked both open-ended and closed-ended questions in order to gather feedback about delivering the DS tool. These stakeholders will be different from those who were interviewed in Aim 1 as to ensure broader applicability of the DS tool.

02

Conditions studied

  • Health Literacy
  • Health Insurance
  • Health Services Accessibility
  • Informed Decision Making

Keywords

  • Health insurance
  • Health services accessibility
  • Decision making
  • Health literacy
03

In context

Lead sponsor

Washington University School of Medicine is the lead sponsor of 1,765 studies on the registry; 271 are open to participants now.

Of its 324 completed or terminated interventional studies of FDA-regulated products, 212 (65%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 64 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Must be without health insurance currently; or
  • Must be enrolled in one of the ACA exchange plans in the past 1 year; and
  • Must speak English

Exclusion criteria

Exclusion Criteria:

  • Currently has health insurance that was not provided by being enrolled in one of the ACA exchange plans in the past year
  • Currently has health insurance that is provided through public insurance or private employer-based insurance
  • Does not speak English
05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Participant)
Enrollment
328 participants (actual)

Study arms

  • Experimental
    Decision Aid (DA)

    The decision aid (DA) will be provided to participants randomized to the experimental/intervention group.

    Behavioral: Decision Aid (DA)

  • No intervention
    Control

    Participants randomized to the control group will receive usual care. They will be directed to the healthcare.gov website and asked to follow the prompts to view and select (if applicable) a health insurance plan.

Interventions

  • BehavioralDecision Aid (DA)

    Participants will be shown (on a computer) a targeted, web-based decision aid focused on the topic of health insurance plans in addition to usual care.

06

What researchers measure

Primary outcomes

  1. Knowledge Score (% Correct)

    8 questions developed in researchers' past work. Assessed health insurance knowledge.

    Time frame: Completed immediately after reviewing Decision Aid tool, taking about 5 minutes to complete.

  2. Decision Self-efficacy

    The decision self-efficacy (DSE) scale measured participants' perceived ability to understand insurance info and resist unwanted decision pressure. The 6 items on the DSE scale were each rated on a 3-point scale (0=Not confident; 2=A little confident; 4=Very confident). The sum of the DSE items was divided by 6 and multiplied by 25 to obtain a score on a 0-100 scale. Higher values indicate more confidence in one's decision-making ability.

    Time frame: Completed immediately after reviewing Decision Aid tool, taking about 5 minutes to complete.

  3. Confidence in Choice

    The 4-item SURE (Sure of myself; Understand information; Risk-benefit ratio; Encouragement) decisional conflict scale assessed confidence in plan choice. Each item could be answered dichotomously (1=yes; 0=no). Responses were summed and a group average was obtained. Higher SURE values indicate more confidence in choice. The scale ranged from 0-4.

    Time frame: Completed immediately after reviewing Decision Aid tool, taking about 5 minutes to complete.

Secondary outcomes

  1. Improvements in HILM 1 (Health Insurance Literacy Measure)

    Assessed confidence estimating costs of care.Improvement in HILM was defined as moving from "not confident" pre-intervention to "a little confident" or "very confident" post-intervention, or from "a little confident" pre-intervention to "very confident" post-intervention.

    Time frame: Pre-intervention and post-intervention

  2. Improvements in HILM 2 (Health Insurance Literacy Measure)

    Assessed confidence understanding terms.Improvement in HILM was defined as moving from "not confident" pre-intervention to "a little confident" or "very confident" post-intervention, or from "a little confident" pre-intervention to "very confident" post-intervention.

    Time frame: Pre-intervention and post-intervention

  3. Intended Choice Metal Level

    Participants indicated the plan they would choose that day. We categorized plans by governmental classifications of metal level (catastrophic, bronze, silver, gold).

    Time frame: Completed immediately after reviewing Decision Aid tool, taking about 5 minutes to complete.

07

Results

Posted Jan 11, 2017

Participant flow

Recruitment occurred between 10/2015 - 1/2016 via community events, online advertisements, social service organizations, and the recruitment/retention arm of our Center for Community-Engaged Research.

Participant flow — Overall Study
MilestoneDecision Aid (DA)Control
Started165163
Completed164163
Not completed10
Withdrew: Technical failure10

Outcome measures

PrimaryKnowledge Score (% Correct)

8 questions developed in researchers' past work. Assessed health insurance knowledge.

Time frame:
Completed immediately after reviewing Decision Aid tool, taking about 5 minutes to complete.
Reported as:
Mean · percentage of 8 items correctly answered
Knowledge Score (% Correct)
percentage of 8 items correctly answeredDecision Aid (DA)Control
Knowledge Score (% Correct)77.6 ± 18.258.8 ± 21.0
Statistical analysis
  • Decision Aid (DA) vs Control · Regression, Linear · p = <.001 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.)
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.16 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.)
  • Decision Aid (DA) vs Control · Regression, Linear · p = <.001 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.)
PrimaryDecision Self-efficacy

The decision self-efficacy (DSE) scale measured participants' perceived ability to understand insurance info and resist unwanted decision pressure. The 6 items on the DSE scale were each rated on a 3-point scale (0=Not confident; 2=A little confident; 4=Very confident). The sum of the DSE items was divided by 6 and multiplied by 25 to obtain a score on a 0-100 scale. Higher values indicate more confidence in one's decision-making ability.

Time frame:
Completed immediately after reviewing Decision Aid tool, taking about 5 minutes to complete.
Reported as:
Mean · units on a scale
Decision Self-efficacy
units on a scaleDecision Aid (DA)Control
Decision Self-efficacy81.5 ± 22.573.0 ± 20.4
Statistical analysis
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.002 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.)
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.30
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.82
PrimaryConfidence in Choice

The 4-item SURE (Sure of myself; Understand information; Risk-benefit ratio; Encouragement) decisional conflict scale assessed confidence in plan choice. Each item could be answered dichotomously (1=yes; 0=no). Responses were summed and a group average was obtained. Higher SURE values indicate more confidence in choice. The scale ranged from 0-4.

Time frame:
Completed immediately after reviewing Decision Aid tool, taking about 5 minutes to complete.
Reported as:
Mean · units on a scale
Confidence in Choice
units on a scaleDecision Aid (DA)Control
Confidence in Choice3.5 ± 0.92.9 ± 1.3
Statistical analysis
  • Decision Aid (DA) vs Control · Regression, Linear · p = <.001 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.)
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.82
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.15
SecondaryImprovements in HILM 1 (Health Insurance Literacy Measure)

Assessed confidence estimating costs of care.Improvement in HILM was defined as moving from "not confident" pre-intervention to "a little confident" or "very confident" post-intervention, or from "a little confident" pre-intervention to "very confident" post-intervention.

Time frame:
Pre-intervention and post-intervention
Reported as:
Number · participants
Improvements in HILM 1 (Health Insurance Literacy Measure)
participantsDecision Aid (DA)Control
Yes6649
No98113
Statistical analysis
  • Decision Aid (DA) vs Control · Regression, Logistic · p = 0.10 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.) · Odds ratio (or): 1.48 · 95% CI 0.92 to 2.36
  • Decision Aid (DA) vs Control · Regression, Logistic · p = 0.26
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.58
SecondaryImprovements in HILM 2 (Health Insurance Literacy Measure)

Assessed confidence understanding terms.Improvement in HILM was defined as moving from "not confident" pre-intervention to "a little confident" or "very confident" post-intervention, or from "a little confident" pre-intervention to "very confident" post-intervention.

Time frame:
Pre-intervention and post-intervention
Reported as:
Number · participants
Improvements in HILM 2 (Health Insurance Literacy Measure)
participantsDecision Aid (DA)Control
Yes8851
No76111
Statistical analysis
  • Decision Aid (DA) vs Control · Regression, Logistic · p = <.001 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.) · Odds ratio (or): 2.52 · 95% CI 1.58 to 4.01
  • Decision Aid (DA) vs Control · Regression, Logistic · p = 0.39 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.)
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.57
SecondaryIntended Choice Metal Level

Participants indicated the plan they would choose that day. We categorized plans by governmental classifications of metal level (catastrophic, bronze, silver, gold).

Time frame:
Completed immediately after reviewing Decision Aid tool, taking about 5 minutes to complete.
Reported as:
Number · participants
Intended Choice Metal Level
participantsDecision Aid (DA)Control
Catastrophic05
Bronze41108
Silver12130
Gold09
Platinum00
Statistical analysis
  • Decision Aid (DA) vs Control · Regression, Logistic · p = <.001 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.) · Odds ratio (or): 10.32 · 95% CI 5.94 to 17.95
  • Decision Aid (DA) vs Control · Regression, Logistic · p = 0.001 (A priori sample size estimates yielded an estimate of 183 per group needed to detect an effect size of 0.34 with 90% power at a 0.05 level of significance and 137 per group with 80% power.)
  • Decision Aid (DA) vs Control · Regression, Linear · p = 0.46

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Decision Aid (DA)—0/165 (0%)0/165 (0%)
Control—0/163 (0%)0/163 (0%)

Baseline characteristics

Age, Continuous
Age, Continuous(years)Decision Aid (DA)ControlTotal
Mean43.1 ± 13.241.4 ± 12.542.3 ± 12.9
Sex: Female, Male
Sex: Female, Male(Participants)Decision Aid (DA)ControlTotal
Female9794191
Male6769136
Race/Ethnicity, Customized
Race/Ethnicity, Customized(participants)Decision Aid (DA)ControlTotal
Not Hispanic156159315
Hispanic8412
Race/Ethnicity, Customized
Race/Ethnicity, Customized(participants)Decision Aid (DA)ControlTotal
African American only96107203
Caucasian only464187
Other (Including Mixed)221537
Education
Education(participants)Decision Aid (DA)ControlTotal
Less than HS121527
HS or GED11199210
College +414990
% Federal Poverty Line
% Federal Poverty Line(participants)Decision Aid (DA)ControlTotal
< 1007294166
100-2496447111
250-399151025
400+13821
Urbanicity
Urbanicity(participants)Decision Aid (DA)ControlTotal
Rural91120
Suburban9799196
Urban5853111
Total number covering
Total number covering(participants)Decision Aid (DA)ControlTotal
197106203
2322153
3+353671

8 further baseline measures are reported on the registry.

08

Study locations

1 site
  • The Washington University in St. Louis School of Medicine
    Saint Louis, Missouri 63110, United States
09

References and documents

Publications

  • Politi MC, Barker AR, Kaphingst KA, McBride T, Shacham E, Kebodeaux CS. Show Me My Health Plans: a study protocol of a randomized trial testing a decision support tool for the federal health insurance marketplace in Missouri. BMC Health Serv Res. 2016 Feb 16;16:55. doi: 10.1186/s12913-016-1314-9. PubMed 26880251 ↗
10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 28, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02522624
Lead sponsor
Washington University School of Medicine
Collaborators
National Institutes of Health (NIH), National Institute on Minority Health and Health Disparities (NIMHD)
Responsible party
Sponsor
First posted
Aug 13, 2015
Start date
Sep 2015
Primary completion
Feb 2016
Completion
Feb 2016
Results posted
Jan 11, 2017
Last update
Feb 28, 2018

Study contacts

Mary C Politi, PhD
principal investigator · Washington University School of Medicine

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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