Association of Autonomic Balance With Phone Call Duration in Healthy Individuals
Abstract
Association of Autonomic Balance With Phone Call Duration in Healthy Individuals Gangwar V, Gupta S, Verma M, Singh AK, John N, Jasrotia RB, Singh A. Association of Autonomic Balance With Phone Call Duration in Healthy Individuals. Cureus. 2023 Jan 9;15(1):e33566. doi: 10.7759/cureus.33566. Abstract Background This study aimed to estimate the association of autonomic balance with the duration of phone calls in healthy individuals. Methodology A total of 30 subjects aged between 18 and 30 years without any established systemic disease and using mobile phones for more than five years with minimum daily usage of 30 minutes were included in this analytical study. Heart rate variability (HRV) was recorded using a three-channel physiograph (AD Instruments South Asia (India) Pvt. Ltd., New Delhi, India) with the software LabChart PROV8.1.8 with HRV Module version 2.0.3 for 10 minutes. Time domain parameters were recorded in terms of the standard deviation of normal to normal interval (SDNN), root mean square of successive differences between normal heartbeats (RMSSD), R-R intervals greater than 50 ms (pRR50), and mean heart rate (MHR), and frequency domain parameters were total power, low-frequency power (LF), high-frequency power (HF), and the ratio of low-frequency to high-frequency power (LF/HF). HRV was recorded three times in each subject that included baseline HRV, HRV during the use of a mobile phone, and HRV after the use of a mobile phone. Results A total of 30 subjects (14 males and 16 females) participated in this study. The mean age of participants was 31.93 ± 8.59 years (32.07 ± 9.87 years for males, and 31.81 ± 7.64 years for females). There were no findings of significant arrhythmia in any of the participants. There was a significant difference in pRR50 on comparing all three phases (p = 0.036). However, there was no significant variation in other parameters such as very low frequency (VLF, ms2), VLF (%), LF (ms2), LF (%), HF (ms2), HF (%), LF/HF, SDNN (ms), RMSSD (ms), Poincare plot standard deviation perpendicular to the line of identity (ms), Poincare plot standard deviation along the line of identity (ms), systolic blood pressure (mmHg), and diabolic blood pressure (mmHg) during, before, and after exposure to mobile phone calls. There was no significant difference in the value of all parameters between males and females (p < 0.05). Conclusions Mobile phone calls may influence HRV and autonomic balance. This change may be affected by the electromagnetic field and by speaking as well. Open access paper: cureus.com call-duration-in-healthy-individuals#!/
AI evidence extraction
Main findings
In 30 participants, pRR50 differed significantly across baseline, during phone use, and after phone use (p=0.036), while other HRV parameters and blood pressure measures did not show significant variation across phases. No significant arrhythmias were reported, and no significant differences were found between males and females for measured parameters.
Outcomes measured
- Heart rate variability (HRV) time-domain parameters (SDNN, RMSSD, pRR50, mean heart rate)
- HRV frequency-domain parameters (total power, LF, HF, LF/HF, VLF)
- Blood pressure (systolic, diastolic)
- Arrhythmia findings
Limitations
- Small sample size (n=30)
- Analytical design described, but randomization/blinding and exposure characterization (e.g., phone model, RF output, SAR, call duration specifics) not reported in the abstract
- Potential confounding from speaking/talking during calls acknowledged by authors
- Short HRV recording window (10 minutes per phase)
Suggested hubs
-
cell-phones
(0.95) Study evaluates physiological measures during mobile phone calls.
View raw extracted JSON
{
"publication_year": 2023,
"study_type": "other",
"exposure": {
"band": "RF",
"source": "mobile phone",
"frequency_mhz": null,
"sar_wkg": null,
"duration": "HRV recorded for 10 minutes at baseline, during a mobile phone call, and after a mobile phone call"
},
"population": "Healthy individuals aged 18–30 years, mobile phone users for >5 years with minimum daily usage of 30 minutes",
"sample_size": 30,
"outcomes": [
"Heart rate variability (HRV) time-domain parameters (SDNN, RMSSD, pRR50, mean heart rate)",
"HRV frequency-domain parameters (total power, LF, HF, LF/HF, VLF)",
"Blood pressure (systolic, diastolic)",
"Arrhythmia findings"
],
"main_findings": "In 30 participants, pRR50 differed significantly across baseline, during phone use, and after phone use (p=0.036), while other HRV parameters and blood pressure measures did not show significant variation across phases. No significant arrhythmias were reported, and no significant differences were found between males and females for measured parameters.",
"effect_direction": "mixed",
"limitations": [
"Small sample size (n=30)",
"Analytical design described, but randomization/blinding and exposure characterization (e.g., phone model, RF output, SAR, call duration specifics) not reported in the abstract",
"Potential confounding from speaking/talking during calls acknowledged by authors",
"Short HRV recording window (10 minutes per phase)"
],
"evidence_strength": "low",
"confidence": 0.7800000000000000266453525910037569701671600341796875,
"peer_reviewed_likely": "yes",
"stance": "neutral",
"stance_confidence": 0.66000000000000003108624468950438313186168670654296875,
"summary": "This analytical study measured heart rate variability (HRV) in 30 healthy mobile phone users at baseline, during a phone call, and after a phone call. The authors report a significant difference across phases for pRR50, while other HRV metrics and blood pressure did not significantly change. They conclude that mobile phone calls may influence autonomic balance, potentially due to electromagnetic fields and/or speaking.",
"key_points": [
"Thirty healthy participants had HRV recorded at baseline, during mobile phone use, and after mobile phone use.",
"A significant difference across phases was reported for pRR50, a time-domain HRV measure.",
"Most other HRV parameters (including LF, HF, LF/HF, SDNN, RMSSD) were not significantly different across phases.",
"No significant arrhythmias were observed in participants.",
"Systolic and diastolic blood pressure did not significantly vary across phases.",
"The authors note that any observed change could relate to electromagnetic fields and also to speaking during calls."
],
"categories": [
"Human studies",
"Mobile phones",
"RF exposure",
"Autonomic nervous system / HRV"
],
"tags": [
"Mobile Phones",
"Phone Calls",
"Radiofrequency Exposure",
"Heart Rate Variability",
"Autonomic Balance",
"pRR50",
"SDNN",
"RMSSD",
"LF/HF Ratio",
"Blood Pressure",
"Healthy Volunteers"
],
"keywords": [
"autonomic balance",
"phone call duration",
"healthy individuals",
"heart rate variability",
"HRV",
"SDNN",
"RMSSD",
"pRR50",
"LF",
"HF",
"LF/HF",
"mobile phone"
],
"suggested_hubs": [
{
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"weight": 0.9499999999999999555910790149937383830547332763671875,
"reason": "Study evaluates physiological measures during mobile phone calls."
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"social": {
"tweet": "Study of 30 healthy adults measured HRV at baseline, during a mobile phone call, and after. pRR50 differed across phases, while most other HRV metrics and blood pressure did not; authors suggest calls may influence autonomic balance (EMF and/or speaking).",
"facebook": "In a small study (n=30), heart rate variability was recorded before, during, and after mobile phone calls. Only pRR50 showed a significant difference across phases, while most other HRV measures and blood pressure did not change; authors note effects could be due to EMF and/or speaking.",
"linkedin": "Cureus (2023): An analytical study in 30 healthy mobile phone users recorded HRV at baseline, during, and after phone calls. pRR50 differed across phases, while other HRV parameters and blood pressure were largely unchanged; authors suggest mobile phone calls may influence autonomic balance, potentially via EMF and/or speaking."
}
}
AI can be wrong. Always verify against the paper.
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