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

BMC Pulmonary Medicine

Table 3 Sweat weight (mg) for frequencies and stimulation and collection time of sweat, with fixed current of 1 mA

Frequency (Hz)^*	Stimulation Time x time of collection of the sweat^#
Frequency (Hz)^*	10 × 30	10 × 15	5 × 30	5 × 15
0 (CDC)	160 ± 5.1	76 ± 4.8	18 ± 0.204	41 ± 0.9
200	137 ± 3.1	118 ± 14.4	147 ± 0.04	77 ± 3.9
1000	222 ± 7.4	138 ± 7.0	83 ± 0.09	80 ± 4.9
5000	267 ± 7.3	164 ± 8.8	111 ± 0.03	69 ± 6.3

CDC, constant direct current; Hz, Hertz, mA, milliampere. *In the analysis considering stimulation time, p-value = 0.0023 (10 > 5 min); ^#In the analysis considering the collection time, p-value = 0.0019 (30 > 15 min). For frequency (p = 0.4672), frequency + stimulation time (p = 0.3046), frequency + collection time (p = 0.6723), time of stimulus + collection time (p = 0.7131) and frequency + collection time + stimulus time (p = 0.7322), there was no statistical association.

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