The search results were checked for doubles.
Invariant item ordering is one method used to check for double monotonicity, i.e. the extent to which items can be ordered hierarchically in the scale in relation to the regulation strategy construct.
Check for double redirects afterward.
After checking for doubles, 34 unique results were left for BMP-2, 10 for BMP-7, 71 for TGF-β, 22 for PDGF, 31 for IGF, 86 for FGF, 19 for VEGF and 18 for PRP.
They were checked for potential doubles as they were to be deleted but none occurred.
Data were checked for quality, double-entered into SPSS (Version 13.0) and verified, before analysis using SPSS and SAS (Version 9.2).
Data were checked for accuracy through double data entry in EpiData software (The EpiData Association, Odense, Denmark, version 3.02) and analyzed using SAS software (version 9.1, SAS Institute Inc., Cary, USA).
At key stages of the coding process 20%% of the coded data was checked for consistency by double coding, which was carried out blind by pairs of researchers (SE, ND, EB) with differences resolved through discussion.
All the data sets will be checked for missing and double-crossed values.
Each participant filled out a self-administered questionnaire, written in Kiswahili, with minimal supervision from research assistants, who checked for completeness before double-entry of data into the computer.
