Στον επόμενο πίνακα εμφανίζονται οι εξισώσεις προσεγγίσεως των φυσιολογικών τιμών του FEV1
Ερευνητής έτος φύλο εξίσωση προσεγγίσεως SEE r2
Berglund 1963 Μ 3.75H-0.036A-1.09 0.55 -
Black 1974 M 2.7H-0.032A+0.6 0.46 0.69
Cherniack 1972 M 3.59H-0.023A-1.51 - -
Cotes 1966 M 3.46H-0.33A-1.12 0.45 0.83
Dickman 1969 M 3.70H-0.031A-1.501 0.39 0.70
Drouet 1980 M 4.22H-0.034A-2.14 - -
Ericsson 1969 M 1.9H-0.045A+0.021W+0.9 0.61 -
Ferris 1965 M 2.9H-0.028A-0.7 0.59 0.61
Ferris 1965 M 3.6H-0.027A-1.65 0.49 0.71
Knudson 1976 M 5.2H-0.027A-4.2 0.54 0.82
Kory 1961 M 3.7H-0.028A-1.59 0.52 0.63
Morris 1971 M 3.62H-0.032A-1.26 0.55 0.73
Quanjer 1977 M 4.05H-0.031A-2.1 0.43 0.73
Quanjer 1977 M 4.06H-0.038A-2.0 0.47 0.76
Quanjer 1977 M 4.17H-0.040A-2.17 0.47 0.76
Salorinne 1976 M 5.43H-0.0273A-3.98 0.52 0.75
Salorinne 1976 M 4.56H-0.0286A-2.75 0.52 0.69
Schoenberg 1978 M -0.064W-0.00033AHW+0.064HW-0.00016W2+0.75lnA-0.05 0.44 0.80
Berglund 1963 F 2.91H-0.031A-0.59 0.39 -
Black 1974 F 2.3H-0.018A-0.13 0.38 0.56
Cherniack 1972 F 2.37H-0.019A-0.19 - -
Dickman 1969 F 3.62H-0.014A-2.571 0.28 0.64
Ericsson 1969 F 2.3H-0.032A+0.001W+0.25 0.36 -
Ferris 1965 F 2.2H-0.024A-0.08 0.42 0.66
Ferris 1965 F 2.5H-0.22A-0.62 0.40 0.68
Hall 1979 F 3.29H-0.029A-1.42 0.36 -
Knudson 1976 F 2.7H-0.021A-0.79 0.43 0.76
Morris 1971 F 3.5H-0.025A-1.93 0.47 0.73
Quanjer 1977 F 3.17H-0.031A-1.13 0.35 0.77
Quanjer 1977 F 3.21H-0.029A-1.29 0.35 0.75
Quanjer 1977 F 3.12H-0.025A-1.25 0.35 0.71
Salorinne 1976 F 3.47H-0.0256A-1.39 0.34 0.81
Salorinne 1976 F 4.51H-0.0333A-2.83 0.33 0.83
Όπου, Α=ηλικία, Η=ύψος, Μ= άνδρας και F = γυναίκα.