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Results from the analysis of each imputed dataset were combined with Rubin's rules (mi estimate command in Stata) 46 (see appendix 3).
We did this by modeling PCS and separately MCS scores using all the covariates in Table 3 as well as the Visit 1 CRIS-CAT (extent, perceived, satisfaction), PCS and MCS scores using STATA 11.1's mi commands to multiply impute 10 values for each of the SF-12 scores, based on regressions of the covariates and examined the combined results with the mi estimate command.
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We used multiple imputation [ 22] methods to deal with the missing data, using the mi impute chained and mi estimate commands for chained equations and subsequent regression model estimation.
Estimates from the imputed datasets were combined using Stata's mi estimate commands, which account for variation in estimates and standard errors across imputed datasets [ 33, 34].
The 7-year derived clusters (actual or imputed) were compared on the key measures of the 7-year baseline questionnaire, using simple linear or logistic regression as appropriate through the multiple imputation estimate commands in Stata/IC V.11.1.
The variance-covariance estimate (VCE) command was used to adjust for this within clinic intraclass correlation [ 49, 50].
Beats expanded the category and as of mid-2012 was estimated to command nearly 30% of the $1-billion market for headphones in North America, according to estimates by NPD Group.
Isis is estimated to command between 20,000 and 31,500 fighters, despite coalition attrition.
Such folk observe that Google has recently announced a tie up with Qihoo 360 Technology, a Chinese firm that puts out popular antivirus software as well as the country's leading web browser.Qihoo is determined to take on Baidu, which has consolidated its grip on China's search market after Google's departure (it is estimated to command a share of greater than 70%).
The estimates were performed with the help of Stata's class of - mi estimate - commands.
The group, a jihadi umbrella organization named on a U.S. State Department terrorism blacklist, is estimated to command hundreds of ISIS sympathizers, and was responsible for a coordinated attack in the capital Jakarta in 2016 that left eight people dead.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com