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Do fallers and nonfallers equally benefit from balance specific exercise program? A pilot study.

Rugelj D, Tomšič M, Sevšek F - Biomed Res Int (2013)

Bottom Line: At the end of eight months of the training program, there was no significant difference between the two groups regarding postural sway.The total center of pressure path length was used as the principal outcome measure for the sample size calculation.Based on these results the a priori sample size calculation yielded the estimate of 110 subjects required to be enrolled in order to get 20 subjects in fallers and 30 subjects in nonfallers group for the 80% power to detect the results as significant.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Health Sciences, University of Ljubljana, Zdravstvena pot 5, 1000 Ljubljana, Slovenia.

ABSTRACT
The purpose of the study was to determine the sample size that would allow broad generalizability of the results. To investigate the differences in the responsiveness of fallers and nonfallers to a multicomponent functional balance specific program, 23 participating subjects (70.1 ± 6.6 years) were divided into nonfallers group (13) and fallers group (10). The components of the balance specific program were (1) changing of the center of gravity (CoG) in the vertical direction, (2) shifting of the CoG to the border of stability, (3) rotation of the head and body about the vertical axis, (4) standing and walking on soft surface, and (5) walking over obstacles or on a narrow path. At the end of eight months of the training program, there was no significant difference between the two groups regarding postural sway. The total center of pressure path length was used as the principal outcome measure for the sample size calculation. Based on these results the a priori sample size calculation yielded the estimate of 110 subjects required to be enrolled in order to get 20 subjects in fallers and 30 subjects in nonfallers group for the 80% power to detect the results as significant.

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Flow chart of subjects needed for recruitment to obtain sufficient sample size taking into consideration adherence to the training sessions.
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fig1: Flow chart of subjects needed for recruitment to obtain sufficient sample size taking into consideration adherence to the training sessions.

Mentions: Therefore taking into consideration that there are 43% of fallers expected in the study group as determined by this study, further considering the expected adherence rate bee 43% and that 96% of the enrolled subjects will meet the inclusion criteria, it can be concluded that at least 110 subjects should be recruited to achieve the sufficient statistical power of the stabilometric tests. Thus, 106 subjects are expected to meet the inclusion criteria, resulting in 46 subjects who are likely to regularly attend the balance specific exercise program and subsequently resulting in 20 subjects in the fallers and 26 subjects in the nonfallers group (Figure 1).


Do fallers and nonfallers equally benefit from balance specific exercise program? A pilot study.

Rugelj D, Tomšič M, Sevšek F - Biomed Res Int (2013)

Flow chart of subjects needed for recruitment to obtain sufficient sample size taking into consideration adherence to the training sessions.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3818815&req=5

fig1: Flow chart of subjects needed for recruitment to obtain sufficient sample size taking into consideration adherence to the training sessions.
Mentions: Therefore taking into consideration that there are 43% of fallers expected in the study group as determined by this study, further considering the expected adherence rate bee 43% and that 96% of the enrolled subjects will meet the inclusion criteria, it can be concluded that at least 110 subjects should be recruited to achieve the sufficient statistical power of the stabilometric tests. Thus, 106 subjects are expected to meet the inclusion criteria, resulting in 46 subjects who are likely to regularly attend the balance specific exercise program and subsequently resulting in 20 subjects in the fallers and 26 subjects in the nonfallers group (Figure 1).

Bottom Line: At the end of eight months of the training program, there was no significant difference between the two groups regarding postural sway.The total center of pressure path length was used as the principal outcome measure for the sample size calculation.Based on these results the a priori sample size calculation yielded the estimate of 110 subjects required to be enrolled in order to get 20 subjects in fallers and 30 subjects in nonfallers group for the 80% power to detect the results as significant.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Health Sciences, University of Ljubljana, Zdravstvena pot 5, 1000 Ljubljana, Slovenia.

ABSTRACT
The purpose of the study was to determine the sample size that would allow broad generalizability of the results. To investigate the differences in the responsiveness of fallers and nonfallers to a multicomponent functional balance specific program, 23 participating subjects (70.1 ± 6.6 years) were divided into nonfallers group (13) and fallers group (10). The components of the balance specific program were (1) changing of the center of gravity (CoG) in the vertical direction, (2) shifting of the CoG to the border of stability, (3) rotation of the head and body about the vertical axis, (4) standing and walking on soft surface, and (5) walking over obstacles or on a narrow path. At the end of eight months of the training program, there was no significant difference between the two groups regarding postural sway. The total center of pressure path length was used as the principal outcome measure for the sample size calculation. Based on these results the a priori sample size calculation yielded the estimate of 110 subjects required to be enrolled in order to get 20 subjects in fallers and 30 subjects in nonfallers group for the 80% power to detect the results as significant.

Show MeSH
Related in: MedlinePlus