Industrial output in August fell a seasonally adjusted 0.9 percent from the previous month, revised downward from the initially reported 0.7 percent fall, the Ministry of Economy, Trade and Industry said Tuesday.

The ministry attributed the downgrade to additional or fresh data obtained from plastic product and pharmaceutical manufacturers that were not available when the preliminary report was issued Sept. 30.

The index of output at factories and mines came to 97.0 against the base of 100 for 2010. The reading represents a drop for the first time in two months.

The index of industrial shipments was also revised downward, posting a 0.1 percent fall against an initially reported increase of 0.4 percent. The industrial inventories index was down 0.2 percent, compared with a 0.1 percent decline in the preliminary report.