Table 4 Median and interquartile range of post-bronchodilator lung function values in women using the Global Lungs Function Initiative (GLI) mixed ethnic population and Hankinson NHANES III Mexican-American reference equations (p-values calculated using Kruskal-Wallis tests)

FEV ₁ (L)

2.3 (2.0–2.6)

2.4 (2.0–2.8)

2.4 (2.0–2.8)

2.2 (1.9–2.5)

<0.001

FVC (L)

2.8 (2.4–3.2)

3.0 (2.5–3.5)

3.0 (2.5–3.5)

2.6 (2.3–2.9)

<0.001

FEV ₁ /height ² (L/m ² )

1.0 (0.9–1.2)

1.1 (0.9–1.2)

1.1 (0.9–1.2)

0.9 (0.8–1.1)

<0.001

FVC/height ² (L/m ² )

1.3 (1.1–1.4)

1.3 (1.1–1.5)

1.3 (1.2–1.5)

1.1 (1.0–1.3)

<0.001

FEV ₁ /FVC (%)

82.7 (79.3–85.3)

80.5 (77.0–83.6)

79.6 (75.6–82.5)

83.0 (79.7–86.1)

<0.001

Percent predicted FEV ₁ (%)

  GLI

112.0 (102.1–123.7)

115.2 (106.1–126.5)

113.9 (102.3–126.0)

103.1 (93.8–112.0)

<0.001

  NHANES III

106.2 (96.9–117.2)

110.4 (100.7–119.7)

107.5 (96.5–118.4)

96.5 (88.5–105.5)

<0.001

Percent predicted FVC (%)

  GLI

111.7 (100.3–122.1)

119.2 (106.4–129.2)

116.9 (104.7–128.3)

101.1 (93.2–109.9)

<0.001

  NHANES III

103.4 (92.8–113.0)

110.5 (98.3–119.1)

107.6 (96.7–118.4)

93.1 (85.5–100.8)

<0.001