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Table 2 Mean PEF recorded using both techniques on three devices.

From: Effects of equipment and technique on peak flow measurements

Technique Mean PEF (l/min) (SD) PEF as % predicted Variance from Wright's PEF And t-test for difference
Wright Meter PEF technique 308 (137) 75% predicted Not applicable
Wright Meter FVC technique 284 (131) 69% predicted 7.8% lower p < 0.0002
Turbine Spirometer PEF technique 291 (138) 71% predicted 5.5% lower p < 0.0002
Turbine Spirometer FVC technique 258 (128) 63% predicted 16.2% lower p < 0.0001
Fleisch Spirometer PEF technique 248 (118) 60% predicted 19.5% lower p < 0.0001
Fleisch Spirometer FVC technique 234 (113) 57% predicted 24.0% lower p < 0.0001
Wright Meter PEF converted to new EU PEF scale 266 (130) 65% predicted 13.6% lower