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8 Table 3 Criteria for normality of spirometry FVC FEV1 MMF FEV1/FVC > 80% of predicted > 80% of predicted .>75% of predicted age <29, >.75 age 30-59, >^.70 age >60, >.65 FVC predicted = 0.147 x Height (in.) - 0.025 x Age (yr.) - 4.241 FEVj predicted = 0.094 x Height (in.) - 0.032 x Age (yr.) - 1.426 (For Blacks, the predicted values were 89% of the above.) MMF predicted 0.044 x Height (in.) - 0.046 x Age (yr.) + 2-806 (For Blacks, the same values were observed.) From: Miller, Thornton, Smith and Morris. Am. J. Ind. Med. 1:55-68, (1980).