AT-2plus User Guide Spirometry Supplement Page 35
Art. No. 2. 510339wa ©1999
AT-2plus User Guide Spirometry Supplement Page 35
Art. No. 2. 510339wa ©1999
Norm Values for USA and Canada
Morris Norm Values
The Morris equations are valid for women between 56 and 72 inches tall and within the age range of 20 to 90 years, and for men between
58 and 80 inches tall and within the age range of 20 to 90 years as follows:
Males Females
FVC 0.1480 x H -0.0250 x A -4.241 0.1150 x H -0.0240 x A -2.852
FEV1 0.0920 x H -0.0320 x A -1.260 0.0890 x H -0.0250 x A -1.932
FEV1/FVC -0.3118 x H -0.2422 x A +107.120 -0.0679 x H -0.1815 xA +88.700
FEF.2 - 1.2 0.1090 x H -0.0470 x A +2.010 0.1450 x H -0.0360 x A -2.532
FEF25 - 75 0.0470 x H -0.0450 x A +2.513 0.0600 x H -0.0300 x A +0.551
FEF75 - 85 0.0130 x H -0.0230 x A +1.210 0.0250 x H -0.0210 x A +0.321
The Morris normals are extended with the following:
Males Females
FEV0.5 0.0831 x H -0.0152 x A -1.914 0.0605 x H -0.0185 x A -0.809
FEV3 -0.1359 x H -0.0271 x A -3.512 -0.1123 x H -0.0257 x A -2.745
FEV3/FVC -0.1593 x H -0.1450 x A +112.090 -0.2380 x H -0.1630 x A +118.160
MVV 3.4040 x H -1.2600 x A -21.400 2.0500 x H -0.5700 x A -5.500
Norm Values for USA and Canada
Morris Norm Values
The Morris equations are valid for women between 56 and 72 inches tall and within the age range of 20 to 90 years, and for men between
58 and 80 inches tall and within the age range of 20 to 90 years as follows:
Males Females
FVC 0.1480 x H -0.0250 x A -4.241 0.1150 x H -0.0240 x A -2.852
FEV1 0.0920 x H -0.0320 x A -1.260 0.0890 x H -0.0250 x A -1.932
FEV1/FVC -0.3118 x H -0.2422 x A +107.120 -0.0679 x H -0.1815 xA +88.700
FEF.2 - 1.2 0.1090 x H -0.0470 x A +2.010 0.1450 x H -0.0360 x A -2.532
FEF25 - 75 0.0470 x H -0.0450 x A +2.513 0.0600 x H -0.0300 x A +0.551
FEF75 - 85 0.0130 x H -0.0230 x A +1.210 0.0250 x H -0.0210 x A +0.321
The Morris normals are extended with the following:
Males Females
FEV0.5 0.0831 x H -0.0152 x A -1.914 0.0605 x H -0.0185 x A -0.809
FEV3 -0.1359 x H -0.0271 x A -3.512 -0.1123 x H -0.0257 x A -2.745
FEV3/FVC -0.1593 x H -0.1450 x A +112.090 -0.2380 x H -0.1630 x A +118.160
MVV 3.4040 x H -1.2600 x A -21.400 2.0500 x H -0.5700 x A -5.500
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