Figure 3

Pulsed direct current and constant direct current in typical and atypical cystic fibrosis (CF) patients considering the CF diagnosis and sweat weight. (A) Linear regression for chloride values (mEq/L) taking into account constant direct and pulsed direct currents. In the graphic is shown the cystic fibrosis diagnosis by CFTR screening and rectal biopsy (in blue color). Twenty-eight subjects were enrolled in the study. The correlation coefficient was 0.704, 95% CI: 0.449 to 0.853 (p < 0.001). For the same graphic there was no association between the two sweat tests performed [pulsed direct (92.05 ± 49.28) and constant direct currents (92.80 ± 31.84)] for the values of the Chloride (mEq/L) (p = 0.911). Pared T-test and Spearman’s correlation test (α = 0.05) were used to study the association and correlation between variables, respectively. (B) Linear regression for sweat weight values (mg) taking into account constant direct and pulsed direct currents. The cystic fibrosis diagnosis by CFTR screening and rectal biopsy (in blue color) were shown in the graphic. Twenty-eight subjects were enrolled in the study. The correlation coefficient was 0.213, 95% CI: −0.190 to 0.554 (p = 0.296). For the same graphic, we observed higher values for the sweat weight on pulsed direct current (234.86 ± 72.49) than the constant direct current (167.34 ± 25.79) (p = 0.001). For the association was used the test T pared and for the correlation the Spearman test. α = 0.05. CCF, Classical Cystic Fibrosis; ACF, Atypical Cystic Fibrosis.