Test of a Web-based Intervention to Promote Hearing Protector Use

Marjorie McCullagh

Status: Completed

Conditions: Noise-induced Hearing Loss

Treatments: Behavioral: Interactive Web-based information; Behavioral: Static Web-based information; Behavioral: Sampler of hearing protection devices

Study type: Interventional

Funder types: Other; NIH

Identifiers

NCT01454895

00027046

Details and patient eligibility

About

The purpose of this project is to compare the effectiveness of several approaches to influencing hearing protector use. The goals of this study are to further develop an intervention to promote farmers' use of hearing protectors, and compare the effectiveness of the developed intervention with two alternative approaches to influencing hearing protector use behavior, delivered in various combinations. This study will determine if significant change in hearing protection use can be achieved in a one-shot web-based or protector-supply intervention. Results will determine the need for future program modifications, e.g., inclusion of booster(s).

Full description

OBJECTIVE: To further develop and test an intervention to promote farmers' use of hearing protection devices (HPDs).

SPECIFIC AIMS: The specific aim of this study is to contrast the effects of three alternative NIHL-prevention intervention strategies, delivered in various combinations on HPD use and use-related attitudes/beliefs. Specifically, the three approaches include: a) an interactive, predictors-based intervention delivered via the Internet ("Interactive Web," IWI); b) a static informational Web site designed to increase farmers' use of HPDs ("Static Web," SWI); and c) sampler of HPDs, e.g., ear muffs, plugs ("HPD Intervention," HPD I).

HYPOTHESIS 1: Participants receiving interactive Web interventions (IWI) will have higher hearing protector device (HPD) use and more favorable use-related attitudes/beliefs than participants not receiving interactive web interventions (IWI); HYPOTHESIS 2: Participants receiving the HPD intervention (HPDI)will have higher HPD use and more positive use-related attitudes/beliefs than participants not receiving the HPD intervention (HPDI). HYPOTHESIS 3: Participants visiting the Web site more frequently will have higher HPD use than those visiting less frequently. HYPOTHESIS 4. There will be no interaction between intervention delivery mode (interactive vs. static) and HPDI.

BACKGROUND: Farmers are among the most noise-exposed group of workers, and experience rates of noise-induced hearing loss (NIHL) of up to 72% compared to workers in other industries (x%). NIHL is associated with negative impact on quality of life, including difficulty in communication, risk of not hearing warning sounds, and tinnitus. Although use of hearing protection devices (HPDs) would protect them from NIHL, use among farmers is low. An earlier study identified predictors of use of HPDs as barriers, situational factors and gender, and accounted for 74% of the variance in use. These results also showed that a small proportion of farmers have successfully developed a variety of methods to overcome barriers and situational factors that interfere with HPD use. This project builds on the earlier work by applying these findings to develop a targeted intervention that also incorporates videotaped messages from the actual farmers who were frequent users of HPDs.

METHODS: The interventions, based on the Pender Health Promotion Model, will consist of Internet-based brief interactive motivational packages regarding adopting HPD use behaviors. Outcome measures will include self-reported frequency of HPD use, measured at 6 and 12 months post-intervention. The study will involve six experimental conditions. In the first condition, farmers will receive the interactive Web intervention (IWI) and an assortment of hearing protection devices (HPDs); in the second condition, farmers will receive the interactive Web intervention (IWI) only; in the third condition, farmers will receive the static Web intervention (SWI) and HPDs; in the fourth condition, farmers will receive the static Web intervention (SWI) only; in the fifth condition, farmers will receive the assortment of HPDs only. A sixth condition will deliver the interactive Web intervention only to farmers who enroll after the target of 709 enrollees, and will receive this service as a courtesy to the American Farm Bureau and its affiliates, but cases 710 and beyond will not receive incentives.

Enrollment: 498 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria:

• farm operators who are active in production at least half-time,
• speak English
• at least 18 years of age
• have Internet access.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Factorial Assignment

Masking: None (Open label)

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498 participants in 6 patient groups

Interactive Web-based Info (IWI) & HPDs

Experimental group

Description:

Subjects will receive interactive Web-based information regarding farm noise exposures, risks to hearing, and strategies for protecting hearing, as well as a mailed sample of various types of hearing protection devices.

Treatment:

Behavioral: Sampler of hearing protection devices

Behavioral: Interactive Web-based information

Interactive Web-based Information (IWI)

Experimental group

Description:

This intervention includes a number of features/techniques designed to promote behavior change. Messages focus on farmer-friendly techniques for adopting use of HPDs. The factors found to be significant predictors of HPD use (Barriers to Use and Situational Factors Influencing HPD Use) are particularly relevant to farmers' learning needs, and are especially emphasized in this model-based intervention to increase hearing protector use among farmers. Participants will select the sequence of features they visit, as well as the time spent in each feature and number of visits to the site. Their patterns of use will be tracked by the enrollment and data collection systems and used in analysis.

Treatment:

Behavioral: Interactive Web-based information

Static Web information (SWI) & HPDs

Experimental group

Description:

Subjects will receive static Web-based information regarding farm noise exposures, risks to hearing, and strategies for protecting hearing, as well as a mailed sample of various types of hearing protection devices.

Treatment:

Behavioral: Sampler of hearing protection devices

Behavioral: Static Web-based information

Static Web information only

Active Comparator group

Description:

Subjects will receive interactive Web-based information regarding farm noise exposures, risks to hearing, and strategies for protecting hearing.

Treatment:

Behavioral: Static Web-based information

Hearing protection Devices only

Experimental group

Description:

Subjects will receive a mailed sample of various types of hearing protection devices.

Treatment:

Behavioral: Sampler of hearing protection devices

Interactive Web-based information only

Other group

Description:

used for cases enrolling after achievement of study enrollment goal

Treatment:

Behavioral: Interactive Web-based information

Sponsors of this trial

Lead Sponsor

Marjorie McCullagh

Collaborating Sponsor

National Institutes of Health (NIH)