Welch Allyn Schiller AT-2plus - Knudson Norm Values

AT-2plus User Guide Spirometry Supplement Page 38
AT-2plus Spirometry Supplement Page 38
Norm Values for USA and Canada
Knudson Norm Values
The Knudson equations are valid for both children and adults
in specific groups according to age and height as shown
following:
Males Females
H = 44 to 61 inches, A = 6 to 11 yrs H = 42 to 58 inches, A = 6 to 10 yrs
FVC 0.1039 x H + 0.0 x A -3.376 0.1092 x H + 0.0 x A -3.749
FVC0.5 0.0760 x H +0.0430 x A -3.050 0.0480 x H + 0.0610 x A -1.740
FEV1 0.0884 x H + 0.0 x A - 2.814 0.0853 x H + 0.0 x A - 2.758
FEV1/FVC -0.2065 x H + 0.0 x A + 100.439 -0.4849 x H + 0.6655 x A + 109.974
FEF25 - 75 0.0859 x H + 0.0 x A - 2.320 0.0559 x H + 0.0 x A - 0.812
PEF 0.1980 x H + 0.1660 x A - 8.061 0.1240 x H + 0.1570 x A - 3.920
FEF50 0.0960 x H + 0.0 x A - 2.545 0.0 x H + 0.1846 x A + 0.736
FEF75 0.0434 x H + 0.0 x A - 1.015 0.0277 x H + 0.0 x A - 0.166
MVV 3.0300 x H - 0.8160 x A - 37.900 2.7600 x H + 3.4000 x A - 108.120
H = 55 to 76 inches A = 12 to 25 yrs H = 52 to 72 inches, A = 11 to 20 yrs
FVC 0.1499 x H + 0.0739 x A - 6.887 0.1057 x H + 0.0699 x A - 4.447
FVC0.5 0.0760 x H + 0.0430 x A - 3.050 0.0480 x H + 0.0610 x A - 1.740
FEV1 0.1318 x H + 0.0636 x A - 6.118 0.0892 x H + 0.0694 x A - 3.762
FEV1/FVC -0.2065 x H + 0.0 x A + 100.439 -0.4849 x H + 0.6655 x A + 109.974
FEF25 - 75 0.1369 x H + 0.0749 x A - 6.199 0.0709 x H + 0.1275 x A - 2.801
PEF 0.1980 x H + 0.1660 x A - 8.061 0.1240 x H + 0.1570 x A - 3.920
FEF50 0.1379 x H + 0.1150 x A - 6.385 0.0732 x H + 0.1111 x A - 2.304
FEF75 0.1008 x H - 0.0057 x A - 4.242
MVV 4.6800 x H + 1.8000 x A - 192.320 2.7600 x H + 3.4000 x A - 108.12
For patients over 18 yrs, the following ITS equations apply:
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
H = 62 to 77 inches, A = 26 to 120 yrs H = 58 to 71 inches, A = 21 to 120 yrs
FVC 0.1524 x H - 0.0214 x A - 4.650 0.1247 x H - 0.0216 x A - 3.590
FVC0.5 0.0831 x H - 0.0152 x A - 1.914 0.0605 x H - 0.0185 x A - 0.809
FEV1 0.1052 x H - 0.0244 x A - 2.190 0.0869 x H - 0.0255 x A - 1.578
FEV3 0.1359 x H - 0.0271 x A - 3.512 0.1067 x H - 0.0257 x A - 2.745
FEV1/FVC 0.0 x H - 0.1050 x A + 86.686 -0.4704 x H - 0.1896 x A + 121.678
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 0.1471 x H - 0.0363 x A - 4.518 0.0531 x H - 0.0344 x A + 1.128
FEF75 - 85 0.0130 x H - 0.0230 x A + 1.210 0.0250 x H - 0.0210 x A + 0.321
PEF 0.2390 x H - 0.0350 x A - 5.990 0.1240 x H - 0.0250 x A - 0.740
FEF25 0.0900 x H - 0.0200 x A + 2.726 0.0690 x H - 0.0190 x A + 2.147
FEF50 0.1737 x H - 0.0366 x A - 5.409 0.0681 x H - 0.0289 x A + 0.609
FEF75 0.0787 x H - 0.0230 x A - 2.483 0.0244 x H - 0.0259 x A + 1.118
MVV 3.0300 x H - 0.8160 x A - 37.900 2.1400 x H - 0.6850 x A - 4.870
In addition, there are the following ITS equations:
FEV3/FVC -0.1593 x H - 0.1450 x A + 112.090 -0.2380 x H - 0.1630 x A + 118.160
Norm Values for USA and Canada
Knudson Norm Values
The Knudson equations are valid for both children and adults
in specific groups according to age and height as shown
following:
Males Females
H = 44 to 61 inches, A = 6 to 11 yrs H = 42 to 58 inches, A = 6 to 10 yrs
FVC 0.1039 x H + 0.0 x A -3.376 0.1092 x H + 0.0 x A -3.749
FVC0.5 0.0760 x H +0.0430 x A -3.050 0.0480 x H + 0.0610 x A -1.740
FEV1 0.0884 x H + 0.0 x A - 2.814 0.0853 x H + 0.0 x A - 2.758
FEV1/FVC -0.2065 x H + 0.0 x A + 100.439 -0.4849 x H + 0.6655 x A + 109.974
FEF25 - 75 0.0859 x H + 0.0 x A - 2.320 0.0559 x H + 0.0 x A - 0.812
PEF 0.1980 x H + 0.1660 x A - 8.061 0.1240 x H + 0.1570 x A - 3.920
FEF50 0.0960 x H + 0.0 x A - 2.545 0.0 x H + 0.1846 x A + 0.736
FEF75 0.0434 x H + 0.0 x A - 1.015 0.0277 x H + 0.0 x A - 0.166
MVV 3.0300 x H - 0.8160 x A - 37.900 2.7600 x H + 3.4000 x A - 108.120
H = 55 to 76 inches A = 12 to 25 yrs H = 52 to 72 inches, A = 11 to 20 yrs
FVC 0.1499 x H + 0.0739 x A - 6.887 0.1057 x H + 0.0699 x A - 4.447
FVC0.5 0.0760 x H + 0.0430 x A - 3.050 0.0480 x H + 0.0610 x A - 1.740
FEV1 0.1318 x H + 0.0636 x A - 6.118 0.0892 x H + 0.0694 x A - 3.762
FEV1/FVC -0.2065 x H + 0.0 x A + 100.439 -0.4849 x H + 0.6655 x A + 109.974
FEF25 - 75 0.1369 x H + 0.0749 x A - 6.199 0.0709 x H + 0.1275 x A - 2.801
PEF 0.1980 x H + 0.1660 x A - 8.061 0.1240 x H + 0.1570 x A - 3.920
FEF50 0.1379 x H + 0.1150 x A - 6.385 0.0732 x H + 0.1111 x A - 2.304
FEF75 0.1008 x H - 0.0057 x A - 4.242
MVV 4.6800 x H + 1.8000 x A - 192.320 2.7600 x H + 3.4000 x A - 108.12
For patients over 18 yrs, the following ITS equations apply:
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
H = 62 to 77 inches, A = 26 to 120 yrs H = 58 to 71 inches, A = 21 to 120 yrs
FVC 0.1524 x H - 0.0214 x A - 4.650 0.1247 x H - 0.0216 x A - 3.590
FVC0.5 0.0831 x H - 0.0152 x A - 1.914 0.0605 x H - 0.0185 x A - 0.809
FEV1 0.1052 x H - 0.0244 x A - 2.190 0.0869 x H - 0.0255 x A - 1.578
FEV3 0.1359 x H - 0.0271 x A - 3.512 0.1067 x H - 0.0257 x A - 2.745
FEV1/FVC 0.0 x H - 0.1050 x A + 86.686 -0.4704 x H - 0.1896 x A + 121.678
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 0.1471 x H - 0.0363 x A - 4.518 0.0531 x H - 0.0344 x A + 1.128
FEF75 - 85 0.0130 x H - 0.0230 x A + 1.210 0.0250 x H - 0.0210 x A + 0.321
PEF 0.2390 x H - 0.0350 x A - 5.990 0.1240 x H - 0.0250 x A - 0.740
FEF25 0.0900 x H - 0.0200 x A + 2.726 0.0690 x H - 0.0190 x A + 2.147
FEF50 0.1737 x H - 0.0366 x A - 5.409 0.0681 x H - 0.0289 x A + 0.609
FEF75 0.0787 x H - 0.0230 x A - 2.483 0.0244 x H - 0.0259 x A + 1.118
MVV 3.0300 x H - 0.8160 x A - 37.900 2.1400 x H - 0.6850 x A - 4.870
In addition, there are the following ITS equations:
FEV3/FVC -0.1593 x H - 0.1450 x A + 112.090 -0.2380 x H - 0.1630 x A + 118.160