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FEV₁ (ml)

FVC (ml)

PEF (ml/sec)

FEF_{25 - 75} (ml/sec)

Average (SD)

Average (SD)

Average (SD)

Average (SD)

≤9 years

28

136

1706.5 (408.01)

2081.8 (472.5)

3719.5 (1093.3)

1802.8 (624.2)

9 to 11 years

24

113

2018.7 (402.5)

2385.3 (420.0)

4561.3 (915.3)

2344.2 (768.9)

11 to 13 years

22

111

2378.8 (364.7)

2898.04 (432.5)

5097.1 (1156.1)

2487.6 (722.6)

>13 years

36

151

3385.4 (706.6)

3983.7 (916.0)

7012.2 (1511.9)

3692.3 (934.1)

Total

110

511

2417.7 (838.4)

2888.2 (984.7)

5177.9 (1763.5)

2629.6 (1068.3)