FEV1 (Liters)

Mean Value

95% CI

P Value

Proppant Workers

3.6

3.38 - 3.79

<0.0001

NHANES III

2.9

2.87 - 2.93

FVC (Liters)

Mean Value

95% CI

P Value

Proppant Workers

4.6

4.30 - 4.80

<0.0001

NHANES III

4.0

3.93 - 3.99

Race: White

FEV1 (Liters)

Mean Value

95% CI

P Value

Proppant Workers

3.8

3.66 - 3.98

<0.0001

NHANES III

3.4

3.36 - 3.41

FVC (Liters)

Mean Value

95% CI

P Value

Proppant Workers

4.8

4.67 - 5.02

<0.0001

NHANES III

4.4

4.41 - 4.48

Race: Black

FEV1 (Liters)

Mean Value

95% CI

P Value

Proppant Workers

3.3

3.12 - 3.20

0.1232

NHANES III

3.2

3.10 - 3.58

FVC (Liters)

Mean Value

95% CI

P Value

Proppant Workers

4.0

3.66 - 4.40

0.9489

NHANES III

4.0

3.97 - 4.06