Pulsed direct and constant direct currents in the pilocarpine iontophoresis sweat chloride test

BMC Pulmonary Medicine

Table 5 Impedance (in Ohm) with frequency data for each diade of stimulation and collection time, with fixed current of 1 mA

Frequency (Hz)	Stimulation time* × collection time on sweat test^#
Frequency (Hz)	10 × 30	10 × 15	5 × 30	5 × 15
0 (CDC)	7656.7 ± 363.1	7527.3 ± 3199.3	9856.1 ± 2517.7	13030.4 ± 2641.0
200	6765.5 ± 1271.5	5500.3 ± 697.5	5681.9 ± 1075.2	5795.6 ± 1457.4
1000	4822.4 ± 1280.9	3895.6 ± 117.2	4965.8 ± 613.7	4356.3 ± 882.2
5000	5317.9 ± 831.4	5330.1 ± 3088.6	5376.0 ± 1691.7	5873.9 ± 74.6

CDC, constant direct current; Hz, Hertz, mA, milliampere. *In the analysis considering time of stimulation, p-value = 0.2433; ^#In the analysis considering the time of collection, p-value = 0.2697. There was no statistical association for frequency (p <0.0001), frequency + stimulation time (p = 0.5898), frequency + collection time (p = 0.7578), time of stimulus + collection time (p = 0.1204) and frequency + stimulus time + collection time (p = 0.9320).

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