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The revision reflected changes in the trade and repair of motor vehicles, motorcycles, personal and household goods and public administration and defence sectors, the Philippine Statistics Authority said.
Full-year 2018 growth was unchanged at 6.2 percent.
First quarter gross domestic product data will be released on May 9.
In mid-March, the Philippines cut its 2019 growth target to 6-7 percent, from 7-8 percent, due to a delay in the legislative approval of this year's national budget and the United States-China trade war.
The 3.757 trillion peso ($72.10 billion) budget bill is now awaiting President Rodrigo Duterte's signature.