Table 5—

The per cent mean differences and mean square of differences between observed values in this study and predicted values according to different prediction equations

FemalesMales
Study [Ref.]Age yrsnMean difference %Mean squared differenceRanknMean Difference %Mean squared differenceRank
FVC
 Present20–805460.90.19813620.40.3691
 Brändli 1020–60346−0.90.2123275−1.00.4185
 Crapo 1515–845464.20.23263622.60.4196
 Gore 918–785244.50.22453401.40.3773
 Hankinson 1720–805460.70.20723620.90.3742
 Quanier 718–7045812.90.44173389.10.6297
 Roca 1820–704580.00.2154338−1.90.4094
 Enright 1265–85144−0.80.191 # 424.20.335 #
FEV1
 Present20–805460.60.12913620.40.1981
 Brändli 1020–603462.40.14032752.50.3146
 Crapo 1515–845464.80.15353623.40.3044
 Gore 918–785244.10.15043402.80.2923
 Hankinson 1720–805462.90.13623623.80.3055
 Quanier 718–704589.20.22173388.50.4267
 Roca 1820–704583.60.15563380.30.2882
 Enright 1265–851445.30.116 # 4213.20.361 #
FEV1/FVC
 Present20–805460.032.59213620.028.8931
 Brändli 1020–603463.241.88762753.440.7135
 Crapo 1515–845461.440.16843620.931.0072
 Gore 918–785241.338.25533400.832.2863
 Hankinson 1720–805462.341.66553622.840.9136
 Quanier 718–704582.738.23123382.035.3414
 Roca 1820–704587.272.59373384.546.7227
 Enright 1265–851446.464.187 # 428.168.598 #
PEF
 Present20–805460.01.94013620.23.9841
 Brändli 1020–603466.82.19852754.74.2914
 Gore 918–78524−5.52.,2236340−7.64.5846
 Hankinson 1720–80546−4.12.0212362−0.94.0222
 Quanier 718–70458−1.02.09233385.84.4295
 Roca 1820–704583.42.1644338−3.74.2303
FEF 25%–75%
 Present20–805460.00.60213620.31.2281
 Brändli 1020–603465.80.78572759.81.4867
 Crapo 1515–845460.10.66743622.41.2392
 Gore 918–785241.40.66033403.91.3324
 Hankinson 1720–805465.80.64923629.31.4646
 Quanier 718–70458−10.80.7575338−1.61.3013
 Roca 1820–704589.00.78263385.41.3835
  • Ranks of the mean spuare are shown and comparisons are restricted to age groups from which the different equations are estimated

  • FVC: forced vital capacity

  • FEV1: forced expiratory volume in one second

  • PEF: peak expiratory flow

  • FEF25%–75%: forced mid-expiratory flow

  • #: not included in the ranking because of inclusion of only by age group 65–80 yrs age group old only