BANGKOK: A draft military-backed constitution in Thailand won the approval of 61.35 percent of those who voted in a referendum on the weekend, the Election Commission said on Wednesday in releasing the final results of the vote.

The results confirmed a convincing win for Prime Minister Prayuth Chan-ocha in Sunday's referendum, the biggest test of public opinion since he, as army chief, seized power in a 2014 coup.

The draft constitution was rejected by 38.65 percent of voters, the commission said, adding that turnout was just over 59 percent.