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Table 8 Odds ratios (OR) of lung function parameters lower than 5th percentile of reference value versus symptoms using "list-wise deletion"* of missing values and a single parameter

From: Reference values of Forced Expiratory Volumes and pulmonary flows in 3–6 year children: a cross-sectional study

Parameter OR CI 95% p value
FVC 4.05 1.41–11.61 0.009
FEV1 4.17 1.85–9.39 0.001
FEV075 2.93 1.48–5.82 0.002
FEV0.5 3.10 1.66–5.76 0.000
FEV1/FVC 2.10 0.84–5.20 0.111
FEV0.5/FVC 3.22 1.45–7.18 0.004
FEV0.75/FVC 2.71 1.22–6.02 0.015
MEF75 10.55 4.42–25.19 0.000
MEF50 3.63 1.78–7.38 0.000
MEF25 2.70 1.14–6.40 0.024
  1. * The single case is eliminated for the variable in which a missing value is present
  2. FVC = forced vital capacity;
  3. FEV1 = forced expiratory volume in one second;
  4. FEV0.75 = forced expiratory volume in 3/4 of a second;
  5. FEV0.5 = forced expiratory volume in half a second;
  6. MEF75 = instantaneous expiratory flow when 25% of FVC has to be expired
  7. MEF50 = instantaneous expiratory flow when 50% of FVC has to be expired
  8. MEF25 = instantaneous expiratory flow when 75% of FVC has to be expired