‣The study design is a cross sectional descriptive study.
‣The study conducted in Nakhon Ratchasima Province which is commonly known as gKhorath and is the largest province in Thailand.
‣The population of VHVs was 7,165 in the Mueang district in Nakhon Ratchasima province in 2013.
‣Data processing: SPSS version 16.0