2.50
Hdl Handle:
http://hdl.handle.net/10755/149132
Type:
Presentation
Title:
Actigraphy in Ambulatory Women
Abstract:
Actigraphy in Ambulatory Women
Conference Sponsor:Sigma Theta Tau International
Conference Year:2003
Author:Torrence, Gabriella Charlotte, N/A
P.I. Institution Name:N/A
Title:BSN Student
Objectives: The purpose of the study was to test (1) equivalence and stability of the Actiwatch-Score (Mini Mitter, Bend, OR) and (2) the range of activity counts under controlled laboratory conditions. Actigraphy is frequently used as an objective measure of activity/rest in various populations. The student’s mentor is evaluating the Actiwatch-Score for that purpose in ambulatory women. Although reports of biometric performance of actigraphy are available, none were found that evaluated the equivalence and stability of the Actiwatch-Score. Methods: A 21-minute activity/rest protocol was developed by the student to test stability (intra-instrument) and equivalence (inter-instrument) reliability estimates of activity counts obtained with two Actiwatch-Score actigraphs. The student wore the actigraphs and performed the activity/rest protocol steps. The mentor was the timekeeper. All testing was done consecutively over a 1 ½ -hour time period with 10-minute rest periods between each testing session. Data were recorded in 30-second epochs. Data were downloaded and imported into a spreadsheet for inspection. A 5 ½ -minute portion of the protocol was missing for one testing session of one actigraph; therefore, the data from all testing periods were edited so that aligned time series could be compared. Descriptive statistics and Pearson Product-Moment correlation coefficients were computed. Results: Data points for each data set varied from 28 to 31. All data sets showed a great deal of variability, and were positively skewed. The protocol yielded activity counts from 0 to 4,982/minute. Strong intra-instrument correlations were demonstrated (r = 0.94 for actigraph 1, r = 0.90 for actigraph 2). Likewise, strong inter-instrument correlations were found (r = 0.93 and 0.94). Conclusions: The two Actiwatch-Score actigraphs tested showed evidence for adequate stability and equivalence reliability under controlled laboratory conditions. The findings suggest that, across a range of activity counts from 0 to nearly 5,000, these actigraphs provide reproducible data.
Repository Posting Date:
26-Oct-2011
Date of Publication:
17-Oct-2011
Sponsors:
Sigma Theta Tau International

Full metadata record

DC FieldValue Language
dc.typePresentationen_GB
dc.titleActigraphy in Ambulatory Womenen_GB
dc.identifier.urihttp://hdl.handle.net/10755/149132-
dc.description.abstract<table><tr><td colspan="2" class="item-title">Actigraphy in Ambulatory Women</td></tr><tr class="item-sponsor"><td class="label">Conference Sponsor:</td><td class="value">Sigma Theta Tau International</td></tr><tr class="item-year"><td class="label">Conference Year:</td><td class="value">2003</td></tr><tr class="item-author"><td class="label">Author:</td><td class="value">Torrence, Gabriella Charlotte, N/A</td></tr><tr class="item-institute"><td class="label">P.I. Institution Name:</td><td class="value">N/A</td></tr><tr class="item-author-title"><td class="label">Title:</td><td class="value">BSN Student</td></tr><tr class="item-email"><td class="label">Email:</td><td class="value">gabriella321@charter.net</td></tr><tr><td colspan="2" class="item-abstract">Objectives: The purpose of the study was to test (1) equivalence and stability of the Actiwatch-Score (Mini Mitter, Bend, OR) and (2) the range of activity counts under controlled laboratory conditions. Actigraphy is frequently used as an objective measure of activity/rest in various populations. The student&rsquo;s mentor is evaluating the Actiwatch-Score for that purpose in ambulatory women. Although reports of biometric performance of actigraphy are available, none were found that evaluated the equivalence and stability of the Actiwatch-Score. Methods: A 21-minute activity/rest protocol was developed by the student to test stability (intra-instrument) and equivalence (inter-instrument) reliability estimates of activity counts obtained with two Actiwatch-Score actigraphs. The student wore the actigraphs and performed the activity/rest protocol steps. The mentor was the timekeeper. All testing was done consecutively over a 1 &frac12; -hour time period with 10-minute rest periods between each testing session. Data were recorded in 30-second epochs. Data were downloaded and imported into a spreadsheet for inspection. A 5 &frac12; -minute portion of the protocol was missing for one testing session of one actigraph; therefore, the data from all testing periods were edited so that aligned time series could be compared. Descriptive statistics and Pearson Product-Moment correlation coefficients were computed. Results: Data points for each data set varied from 28 to 31. All data sets showed a great deal of variability, and were positively skewed. The protocol yielded activity counts from 0 to 4,982/minute. Strong intra-instrument correlations were demonstrated (r = 0.94 for actigraph 1, r = 0.90 for actigraph 2). Likewise, strong inter-instrument correlations were found (r = 0.93 and 0.94). Conclusions: The two Actiwatch-Score actigraphs tested showed evidence for adequate stability and equivalence reliability under controlled laboratory conditions. The findings suggest that, across a range of activity counts from 0 to nearly 5,000, these actigraphs provide reproducible data.</td></tr></table>en_GB
dc.date.available2011-10-26T09:56:43Z-
dc.date.issued2011-10-17en_GB
dc.date.accessioned2011-10-26T09:56:43Z-
dc.description.sponsorshipSigma Theta Tau Internationalen_GB
All Items in this repository are protected by copyright, with all rights reserved, unless otherwise indicated.