There are many sources for estimating the affiliation of Thai people in Christian denominations. The primary sources are from the government population data and from the membership records of the individual denominations. Reliable data on determining religious affiliation are not based on objective standards in all cases. The most objective report that counts individuals is government census data. Less objective standards would seek to include theological criteria in the counting of members such as belief, baptism, confirmation as well as age criteria such as persons over age 12, 15, 18 or adulthood. None of these standards of various denominational data discriminate based on gender, health or ethnicity.