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Table 4 Coefficients of repeatability (CR) retested after one hour (n = 237), after five hours (n = 79) and after 3-10 days (n-76) (in % from initial value/absolute value)

From: Random variation of inspiratory lung function parameters in patients with COPD: a diagnostic accuracy study

Parameter

Retest after one hour

Retest after five hours

Retest another day

FEV1

11.8

13.7

17.9

IC

18.9

21.3

22.7

FIV1

13.5

17.9

18.0

PIF

17.9

17.8/0.90

17.9/0.85

MIF50

20.4

21.0

19.2

  1. FEV1 = Forced Expiratory Flow in one second; FIV1 = Forced Inspiratory Flow in One second; IC- Inspiratory Capacity; MIF50 = Maximal Inspiratory Flow at 50%; PIF = peak Inspiratory Flow.
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BMC Pulmonary Medicine

ISSN: 1471-2466

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