Bangladesh, India, Indonesia, Thailand, Vietnam - INDEPTH NCD-RF (Non Communicable Diseases Risk Factor) Surveillance, 2005 Data (Release 2016)

Action To Minimize Losses:
A standardised data entry programme using EPIDATA software was used in each site for data entry to ensure uniform database structure across sites. In some sites, additional questionnaires were employed, and sites updated their database structure accordingly but kept the common core STEP data structure intact. Plausible values for each variable were set in the data entry programme to prevent any possible mistakes during data entry process. Double entry for 10% of data was also done in each site.

Cleaning Operation(s):
Each site was responsible for cleaning their data, and the cleaned data was sent to the group coordinator. The site data were later merged into a cross-site dataset to facilitate further cross-site analysis. Further cleaning process of outliers were undertaken in the pooled data, and uniform indicators onvarious risk factors (for example, variables on the level of physical activity or overweight, etc.) were developed for all sites to ensure consistency and comparability.