Search Results

You are looking at 21 - 30 of 90 items for :

  • "imputation" x
Clear All
Restricted access

David Geard, Amanda L. Rebar, Peter Reaburn and Rylee A. Dionigi

rate their life these days (0 =  the worst possible life to 10 =  the best possible life ) ( Pruchno & Wilson-Genderson, 2014 ). Data Analyses Model fit analyses Multiple imputation by chained equations was used to account for missing data in this study because it imputes complex multivariate data by

Restricted access

Natalie Kružliaková, Paul A. Estabrooks, Wen You, Valisa Hedrick, Kathleen Porter, Michaela Kiernan and Jamie Zoellner

sex, age, race, ethnicity, educational attainment, employment/disability status, income, health literacy level, number of children, smoking status, and BMI. In addition, models used intention-to-treat with baseline observation carried forward imputations. 36 , 54 , 55 Results Demographics Of the 301

Restricted access

Janet M. Boekhout, Brenda A.J. Berendsen, Denise A. Peels, Catherine A.W. Bolman and Lilian Lechner

point, and an interaction term between the weekly minutes of MVPA and measurement time point. Imputation of missing data was not applied, as it has been established that the use of incomplete cases in multilevel analysis results in more accurate estimations than applying imputation ( Twisk, De Boer, De

Restricted access

Kari Roethlisberger, Vista Beasley, Jeffrey Martin, Brigid Byrd, Krista Munroe-Chandler and Irene Muir

screened to assess missing data and normality. Missing data is typically not a problem if it is under 5% or 10% ( Bennett, 2001 ; Schafer, 1999 ) Mean imputation was used for seven missing data points for five variables. Given the low percentage (.002%) of missing data this approach is considered

Restricted access

David X. Marquez, Robert Wilson, Susan Aguiñaga, Priscilla Vásquez, Louis Fogg, Zhi Yang, JoEllen Wilbur, Susan Hughes and Charles Spanbauer

than multiple imputation. Because it resamples the empirical dataset, rather than fitting it to a normal distribution, it better retains the shape of non-normal distributions. One disadvantage of hot decking is that while it retains the same mean and variance as the original data, it can change the

Restricted access

Keith R. Lohse, Jincheng Shen and Allan J. Kozlowski

complicated statistical adjustments (such as multiple imputation) when data are missing at random. • Including only cases with complete data will reduce statistical power and risk bias to the model if data are missing not at random (MNAR). • Depending on the method employed, imputing missing values may not

Restricted access

James Annesi

participants who initiated treatment and deidentified prior to analyses. Multiple imputation 34 was used to replace missing cases within the longitudinal analyses. Because of consistencies in both the directionality of changes in self-regulation for physical activity, negative mood, exercise-related self

Restricted access

Rebecca A. Schlaff, Meghan Baruth, Faith C. LaFramboise and Samantha J. Deere

scales, the average CESD-10 item score for questions 1 through 9 was calculated for each participant and mean imputation was used for item 10. 30 , 31 Statistical Analyses Means and SDs as well as frequencies were calculated for all variables of interest. Linear regression was used to assess the

Restricted access

Florian Herbolsheimer, Stephanie Mosler, Richard Peter and the ActiFE Ulm Study Group

accelerometer. The maximum distance between a weather station and a participant’s residence was 40 km. Furthermore, sex and age (in years) were reported. Missing values Complete data were provided by 77.2% of all participants. An imputation procedure was applied for the depression scale if one of seven items

Restricted access

Janet Robertson, Eric Emerson, Susannah Baines and Chris Hatton

for the outcome “frequent participation in sport/exercise,” the strength of association between sociodemographic factors, and participation separately for participants with and without intellectual disability. Missing data among sociodemographic variables were imputed using multiple imputation