Sentences with phrase «imputation analyses»

The strength of the association between early breastfeeding experience and postpartum depression was similar in magnitude when comparing the complete case with the multiple imputation analyses.

Not exact matches

We also used multiple imputation to evaluate the sensitivity of the estimates obtained from the complete case analysis.

A new GWAS and meta - analysis with 1000Genomes imputation identifies novel risk variants for colorectal cancer.

Survival analysis, Data imputation, Mixed models, GEEs, Propensity score matching, Sample size calculations, occasional genetic analysis

The consistency of primary analyses with those based on multiple imputation suggests that results are robust to data that are missing at random, although of course we were unable to evaluate bias associated with unobserved variables.

To test whether results were still significant under the assumption that data were missing at random, we conducted multiple imputation and ran our primary analyses across 10 imputed data sets, 37 adjusting for additional variance across imputations.

Finally, analyses were conducted and compared using both the imputed data set, and a subset of data containing only participants with complete data, and indicated no bias resulting from imputation.

Missing data: The frequency and patterns of missing data will be examined and sensitivity analyses will be performed to compare the results of analyses restricted to families with complete data and analyses where those with missing data are considered using multiple imputation.64, 65

A sensitivity analysis using multiple imputation to replace missing values yielded essentially the same results as the main analysis

There were no differences in either anthropometric measures at age 6 years or socioeconomic variables between children with BMI data at age 4 years and those without it, and analyses including all children produced findings consistent with those obtained using multiple imputation.

For sensitivity analysis, we performed multiple imputation using predictive mean matching70 and results are reported for the primary outcomes and SF - 12.

STATA version 13 was used to carry out the multiple imputation, Exploratory Factor Analysis (EFA) and the k - means cluster aAnalysis (EFA) and the k - means cluster analysisanalysis.

Missing data will in the first instance be managed with a «last observation carried forward» approach with additional sensitivity analyses undertaken using multiple imputation methods.

Then, we conducted sensitivity analysis comparing the mean scale scores across age and gender among the complete cases, all of the available cases, and the imputed cases (coefficients and standard errors from 5 data sets were adjusted for the variability between imputations according to Rubin's rule).

Similarly, the complete - case analysis implies that drinking alcohol is negatively associated with internalizing problems; after imputation, that relation is insignificant and there is evidence of a significant positive association between smoking and internalizing problems.

An important consideration in implementing MICE procedures is that the model used to create the imputations should be more general than the analysis model in terms of including all interactions that will be examined in the analyses (1, 8).

In contrast, if the variables are assumed to be independent (i.e., gender is not used to impute internalizing symptoms), then the analysis may find a lack of relation simply because the imputations were generated by assuming there was none.

To avoid bias to parameter estimates when 32 % of the missing cases were excluded, we created 20 multiply imputed data sets in STATA using all variables included in the analyses to inform the imputations (Allison, 2002).

Single parent could not be used in our imputation model for missing values, as it was too rare an event to impute, so it was dropped from our complete - case analysis also for consistency.