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Fig. 3 | BMC Gastroenterology

Fig. 3

From: The influence of various distractions prior to upper gastrointestinal endoscopy: a prospective randomized controlled study

Fig. 3

Comparison of autonomic nerve function between pre- and post-distraction among the 4 groups. a Comparison of Log HF power between pre- and post-distraction among the 4 groups. b Comparison of LF power/ HF power ratio between pre- and post-distraction among the 4 groups. The white bar indicates the value at pre-distraction. The gray bar indicates value at post-distraction. HF, high frequency; LF low frequency; *p <  0.001

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