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. 2012 Oct 10;4:347–350. doi: 10.2147/CMAR.S34194

Table 2.

Comparison of pulmonary function tests pre- and post-CyberKnife treatment

Pulmonary function test results
Pre-CyberKnife vs 3–4 months post-CyberKnife
PFT parameter (percentage of predicated) Mean n (number of patients) Standard deviation P-value
FVC – pre 76.2 37 21.6 0.346
FVC – post 74.2 37 19.6
FEV1 – pre 56.5 37 22.1 0.781
FEV1 – post 56.2 37 21.9
FEV1/FVC – pre 74.6 37 17.9 0.905
FEV1/FVC – post 74.8 37 18.0
FEF – pre 29.4 37 21.7 0.478
FEF – post 31.0 37 20.9
FIVC – pre 2.1 33 0.7 0.189
FIVC – post 2.2 33 0.8
SVC – pre 75.1 35 17.8 0.383
SVC – post 76.9 35 17.7
IC – pre 74.9 32 17.8 0.267
IC – post 72.1 32 20.9
ERV – pre 106.9 32 146.8 0.668
ERV – post 112.7 32 92.0
DLCO – pre 56.1 33 24.4 0.672
DLCO – post 54.8 33 19.8
DLVA – pre 79.6 32 30.5 0.287
DLVA – post 90.8 32 53.5
VA – pre 71.1 32 19.1 0.299
VA – post 67.0 32 21.4

Abbreviations: PFT, pulmonary function test; FVC, forced vital capacity; FEV1, forced expiratory volume in 1 second; FEF, forced expiratory flow; FIVC, forced inspiratory vital capacity; SVC, slow vital capacity; IC, inspiratory capacity; ERV, expiratory reserve volume; DLCO, diffusing capacity of the lung for carbon monoxide; DLVA, diffusion capacity corrected for alveolar volume; VA, alveolar volume.