Speech Intelligibility and Cognition: Are Inpatients Impaired by Noise?
- Conditions
- Auditory PerceptionMemoryHearing Impairment
- Interventions
- Other: quietOther: non-speech noiseOther: speech noise
- Registration Number
- NCT00695162
- Lead Sponsor
- Portland VA Medical Center
- Brief Summary
Study Objectives:
* 1. To examine the extent to which noise typical of nursing units reduces speech intelligibility in acutely ill hospitalized patients
* 2. To examine the extent to which noise typical of nursing units impairs recall in acutely ill hospitalized patients
* 3. To quantify severity of reduced performance associated with age, familiarity with the healthcare setting, hearing and health status.
Plan:
One hundred and twenty inpatients from the four medical/surgical nursing units at the Portland VA Medical Center, 60 with normal hearing and 60 with hearing impairment will be recruited to participate in the study. Following assessment to ascertain eligibility and obtaining informed consent, patients will be tested in a sound booth housed at the National Center for Rehabilitative Auditory Research (NCRAR). Designed so that each patient serves as his or her own control, we can accommodate considerable baseline variability between patients without adversely affecting required sample size. Patients' performance in speech intelligibility and recall tests will be measured using a constant level of speech, in controlled environments of no noise (baseline), white noise, hospital noise and hospital noise with speech, all delivered via headphones in pseudo-random order. Performance will be measured in each type of noise at decibel levels equivalent to those currently experienced on nursing units and at lower levels that prior studies have shown are more conducive to effective communication
By selecting measures that are particularly relevant to the safe care of hospitalized patients, and that have been studied extensively in healthy populations in highly controlled conditions, we expect to find compelling and unambiguous evidence that hospitalized patients correctly hear and recall very little of what is said to them during their hospitalizations. The majority of hospitalized patients stay on acute care nursing units during most or all of their hospitalizations, making this an appropriate population to study in the context of their responses to the noises typical in these environments. Perhaps most importantly, this study will heighten awareness of health-care personnel to the levels of impairment suffered by their patients - both in their ability to correctly interpret speech and to recall it - in the typical noisy environments of nursing units.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 84
Not provided
Not provided
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description 1 quiet hearing impaired inpatients 1 non-speech noise hearing impaired inpatients 1 speech noise hearing impaired inpatients 2 quiet Non-hearing-impaired inpatients 2 non-speech noise Non-hearing-impaired inpatients 2 speech noise Non-hearing-impaired inpatients
- Primary Outcome Measures
Name Time Method Change in the percent of correctly identified words at different signal-to-noise rations (levels +4, +8 and +12 db) above that of the two types of noise, relative to the percent identified in quiet immediately after presentation
- Secondary Outcome Measures
Name Time Method Change in the percent of correctly recalled words at different signal-to-noise rations (levels +4, +8 and +12 db) above that of the two types of noise, relative to the percent recalled in quiet five minutes after presentation
Trial Locations
- Locations (1)
Portland VA Medical Center
🇺🇸Portland, Oregon, United States