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Table 5 Distribution (mean and standard deviation) of lung function parameter by symptom status

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

 

Asymptomatic

Symptomatic

Total

 

N

m (sd) §

N

m (sd) §

N

m (sd) §

FVC (lt)a

327

1.10(0.22)

128

1.07(0.24)

455

1.09(0.23)

FEV1 (lt)b

409

1.09(0.20)

169

1.05(0.21)

578

1.08(0.21)

FEV0.75(lt)d

493

1.04(0.19)

190

0.98(0.19)

683

1.02(0.19)

FEV0.5 (lt)c

562

0.90(0.16)

205

0.86(0.16)

767

0.89(0.16)

FEV1/FVC

285

0.96(0.04)

116

0.96(0.04)

401

0.96(0.04)

FEV0.75/FVC

311

0.92(0.05)

123

0.91(0.07)

434

0.92(0.06)

FEV 0.5/FVC

327

0.81(0.07)

128

0.80(0.09)

455

0.81(0.08)

MEF75(lt/s)e

327

2.32(0.50)

128

2.18(0.53)

455

2.28(0.51)

MEF50(lt/s)f

327

1.66(0.38)

128

1.57(0.40)

455

1.64(0.39)

MEF25(lt/s)g

327

0.85(0.24)

128

0.82(0.28)

455

0.84(0.25)

  1. §m(sd) = mean (standard deviation)
  2. aFVC = forced vital capacity;
  3. bFEV1= forced expiratory volume in one second;
  4. cFEV0.75 = forced expiratory volume in 3/4 of a second;
  5. dFEV0.5 = forced expiratory volume in half a second;
  6. eMEF75 = instantaneous expiratory flow when 25% of FVC has to be expired
  7. fMEF50 = instantaneous expiratory flow when 50% of FVC has to be expired
  8. gMEF25 = instantaneous expiratory flow when 75% of FVC has to be expired
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Respiratory Research

ISSN: 1465-993X

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