Repeatability of the Evaluation of Perception of Dyspnea in Normal Subjects Assessed Through Inspiratory Resistive Loads

Table 1.: Demographic characteristics and pulmonary function of subjects.

Characteristics
Subjects, n	16
Age (years), mean ± SD	36.3 ± 11.9
Sex (male/female), n	8/8
Body mass index (kg/m2), mean ± SD	23.9 ± 2.8
Race (Caucasian), n	16
Educational level, n (%)
≤ 8 years of school	2 (12.5%)
> 9 years school and < high school	2 (12.5%)
≥ high school	12 (75.1)
Physical activity ≥ 2x/week	9 (56.3%)
FEV1 (L), mean ± SD	3.5 ± 0.7
FEV1 (% predict)*, mean ± SD	98.8 ± 9.8
FVC (L), mean ± SD	3.8 ± 0.7
FVC (% predict)*, mean ± SD	95.3 ± 10.1

n = number of cases; SD = Standard deviation; PEFR = peak expiratory flow rate; FEV1 = forced expiratory volume in one second, FVC = forced vital capacity. *Percent predicted for age, height and sex (Pereira, et al.: J Bras Pneumol 2007 Aug; 33(4): 397- 406).