Table 1.
Bivariate analysis of the sociodemographic, clinical, and functional variables that may predict suboptimal peak inspiratory flow.
| Total (n = 122) |
Adequate PIF (n = 88) |
Sub-Optimal PIF (n = 34) |
p Value * | |
|---|---|---|---|---|
| Males | 106 (87%) | 76 (86%) | 30 (88%) | 0.99 |
| Age (years) | 68 ± 10 | 67 ± 10 | 72 ± 10 | 0.09 |
| Primary education | 78 (64%) | 53 (60%) | 25 (74%) | 0.17 |
| Active smoking | 49 (40%) | 34 (39%) | 15 (44%) | 0.58 |
| BMI (Kg/m2) | 28.4 ± 5.6 | 28.4 ± 5.4 | 28.5 ± 6.1 | 0.9 |
| Forced expiratory volume in 1 s (FEV1) (mL) | 1350 ± 528 | 1387 ± 562 | 1129 ± 371 | 0.04 |
| FEV1 (%) | 47 ± 16 | 49 ± 17 | 43 ± 14 | 0.08 |
| Forced vital capacity (FVC) (mL) | 2852 ± 908 | 3005 ± 982 | 2456 ± 500 | <0.01 |
| FVC (%) | 77 ± 18 | 80 ± 19 | 70 ± 12 | <0.01 |
Values are expressed as the mean ± standard deviation or absolute (relative) frequencies according to the nature of the variable. * Calculated using Chi-squared tests for categorical variables and Student t tests for quantitative variables with independent data. BMI: body mass index. FEV1: Forced expiratory volume in 1 s. FVC: forced vital capacity.