Ecological Momentary Determinants of Sedentary Behavior

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

17 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-10-31

Study Completion Date

2017-02-28

Brief Summary

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A two phase trial to understand the personal, behavioral, environmental, and contextual factors that underpin sedentary behavior and to systematically test a series of contextual prompt characteristics that may lead to subsequent change in sedentary behavior.

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Detailed Description

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Phase 1: This is an observational study that will utilized Ecological Momentary Assessment, to determine which personal (e.g. fatigue, mood, and stress level), behavioral (e.g. watching TV, working at desk, and eating meals), environmental (e.g. being at home or work, time of the day, and weather) and contextual factors were associated with sedentary behavior. Three EMAs per day will be sent randomly sent to participants on weekdays (Monday to Friday), for four consecutive weeks (total of 20 days). During these days, participants will also wear an activPAL device to objectively measure sedentary behavior. The purpose of the study is to identify the combination of factors most likely to precede and proceed short (\<30 min) and long (≥30 min) bouts of sedentary behavior.

Phase 2: A micro-randomized trial will be used to evaluate the efficacy of an email-based prompt to elicit a proximal effect (e.g., a postural response defined as a transition from seated to standing or seated to moving within 5 minutes to interrupt prolonged sitting) compared to a no prompt condition. A secondary aim of this study is to determine whether prompts that encourage standing are more likely to elicit a response than those that encourage moving. An exploratory aim is to examine whether varying the content of the stand or move prompt to include combinations of short term goals and employer approval, influence the magnitude of response.

Conditions

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Sedentary Behavior

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

FACTORIAL

PART B: A three-factor design with two-levels yielded eight experimental conditions, half of which encouraged standing more (stand; n prompt types = 80, n total prompts =800) and the other half encouraged moving more (move; n prompt types = 80, n total prompts =800).

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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Prompt

An email based prompt was sent- containing either a stand or move message. Exploratory variations of the prompt were designed to include the addition of a goal e.g., stand for the next 5-minutes, and/or employer support e.g., PTS says "stand for the next 5 minutes".

Group Type EXPERIMENTAL

Prompt sent

Intervention Type BEHAVIORAL

No Prompt

Prompt delivery was sequentially randomized to be sent (ST) or not sent (NST) to all participants (probability of 0.5), at eight decision points per day (between 9am and 5pm), to achieve a total of 3200 randomizations across participants (160 per participant). Therefore 50% of the time, no prompt was sent.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Prompt sent

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Full-time employees
* Males or females
* Ages 18-65
* Sedentary working habits (as indicated by \>7 hrs/day of sedentary time at work in the Sedentary Behavior Questionnaire)
* Willing to engage in the study assessment and intervention for 10 weeks.

Exclusion Criteria

* Non-ambulatory, pregnant
* Non-English speaking
* Diagnosis of psychiatric problems or taking psychiatric medications
* Medical history that prohibits prolonged standing.

Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes