Skip to main content
Fig. 4 | BMC Pulmonary Medicine

Fig. 4

From: Evaluation of continuous constant current and continuous pulsed current in sweat induction for cystic fibrosis diagnosis

Fig. 4

The comparison between Caucasians and non-Caucasians for the values of electrical impedance and body mass index, according to the current applied showed that the body mass index was higher in the group of Caucasians [continuous constant current (CCC) and triangular pulsed current (TPC)], and the sinusoidal pulsed current (SPC) was associated with lower electrical impedance in the group of Caucasians. a Body mass index with the application of CCC. (Non-Caucasians) N = 125; 21.26 ± 5.7; 20.21 (11.06 to 42.29); 20.25 to 22.27; (Caucasians) N = 133; 23.5 ± 6.07; 23.72 (0 to 38.2); 22.46 to 24.55; (p-value = 0.001). b Electrical impedance with the application of SPC. (Non-Caucasians) N = 20; 6.98 ± 2.36; 7.55 (3.19 to 11.05); 5.87 to 8.09; (Caucasians) N = 34; 5.64 ± 1.74; 5.66 (2.12 to 9.62); 5.03 to 6.25. (p-value = 0.037). c Electrical impedance with the application of TPC. (Non-Caucasians) N = 105; 20.6 ± 5.06; 19.57 (11.06 to 34.84); 19.61 to 21.58; (Caucasians) N = 98; 23.14 ± 6.19; 22.9 (0 to 38.2); 21.89 to 24.38. (p-value = 0.001). Data are presented in legend as: number of individuals; mean ± standard deviation; median (minimum to maximum); confidence interval for the mean value; confidence interval for the mean value; and in figure as median (black line) and 95% confidence interval (green line). Statistical analysis conducted through Wilcoxon signed-rank test and Mann-Whitney U test of independent samples. Alpha = 0.05. The currents are shown as Ω using the following equation: [Z = VRMS / IRMS (Ω)]; Z = composite impedance (Ω); VRMS = effective voltage measured (volts root mean square); IRMS = effective current measured (current root mean square). Also, the body mass index is shown as weight (Kg)/height2 (m). Only the associations with p-value < 0.05 was presented as figure

Back to article page