Industrial output in February dropped 3.9 percent from the previous month, a downward revision from the preliminary decrease of 3.3 percent, the Ministry of International Trade and Industry said in a report released April 15.

The production index for mines and factories, which takes 1990 as a base year of 100, came to a seasonally adjusted 97.8, down 3.6 percent from a year ago, according to the report. The shipments index plunged 4.2 percent to 99.5, representing a downward revision of 0.6 percentage point from a preliminary drop of 3.6 percent.

The downward revisions for both index reports are attributable to the performance of medicines and transformers, which were not reflected in the preliminary report, the ministry said.