BRUSSELS (AFX) - The economic sentiment indicator in the euro zone was 100.1 in September, unchanged from August, the European Commission said. Consumer confidence in September fell to -9 in September from -8 in August and -6 in July, while industrial confidence dropped to -11 from -10 and -9 respectively, the commission said. Construction confidence rose to -5 from -8 in August and -7 in July. Retail confidence, at -6, was higher than in -8 in August but lower than -4 in July. The Commission noted that a very high percentage of responses to the survey came in before the terrorist attacks against the US. "Only next month, when we publish October's results, will it be possible to assess the effect of the terrorist attacks on the opinions of consumers and managers," it said. The Commission has revised its ccalculation of the economic sentiment indicator, incorporating the retail trade confidence indicator rather than the share price index. With the aim of making the indicator more forward-looking, the Commission has also removed a question about the financial situation of households over the past 12 months.