Table 1 Subject Characteristics.

Number, (M/F)

17 (8/9)

Age, years

61 (20)

Age Range, years

34-83

Cough Duration, months

60 (147)

FEV1, %predicted

88.2 (16.7)

FVC, %predicted

88.5 (20.3)

Auditory perceptual voice analysis, % abnormal

63

Maximum phonation time, seconds

12.8 (8.9)

>15

Range, seconds

1 - 26

Jitter, percent

1.7 (1.6)

< 1

Range, percent

0.4 - 6.5

Harmonic to noise ratio, dB SPL

15.9 (3.8)

> 20

Range, dB SPL

10 - 24.7

Speaking fundamental frequency, Hertz

Female: 178 (20)

180 - 200 (female)

Range, Hertz

154 - 198

90-130 (male)

Range, Hertz

Male: 110 (14)97 - 133

Closed phase, percent

43.5 (6.4)

44.5

Range, percent

32 - 53