The Effect of Exposure to Mobile Phones on Electrical Cardiac Measurements: A Multivariate Analysis
Abstract
The Effect of Exposure to Mobile Phones on Electrical Cardiac Measurements: A Multivariate Analysis and a Variable Selection Algorithm to Detect the Relationship With Mean Changes Alharbi N, Alassiri M. The Effect of Exposure to Mobile Phones on Electrical Cardiac Measurements: A Multivariate Analysis and a Variable Selection Algorithm to Detect the Relationship With Mean Changes. Int J Cell Biol. 2024 Oct 3;2024:7093771. doi: 10.1155/2024/7093771. Background: The exponential growth in mobile phone usage has raised concerns about electromagnetic field (EMF) exposure and its health risks. Blood pressure and BMI, which impair heart function due to decreased adrenoreceptor responsiveness, parasympathetic tone withdrawal, and increased sympathetic activity, may further exacerbate these risks. However, the effects of radiofrequency electromagnetic (RF-EM) exposure from mobile phones on electrocardiograms (ECGs) and heart rate variability (HRV) in individuals remain unclear. Purpose: Building upon our previous findings on HRV changes due to mobile phone proximity, this study is aimed at significantly enhancing the analytical approach used to assess the effects of mobile phones on cardiac parameters. This study exploits data from a previous study but with a different purpose. The aim of this study is twofold: (a) to examine whether exposure to mobile phones changes the five variables (P-R, QRS, QT, ST, and HR) in a multivariate manner and (b) to examine whether the blood pressure and/or the body mass index (BMI), which acts as a proxy for obesity, have an effect on the change of these five variables. For both aspects of the study, four cycles are performed. Method: We conducted multivariate analysis on previously collected electrical cardiac measurement data from 20 healthy male subjects exposed to mobile phone EMF, with the mobile phones placed at four different body locations. The one-sample Hotelling T 2 test on the mean vector of differences was utilised instead of multiple paired t-tests. This multivariate method comprehensively analyzes data features and accounts for variable correlations, unlike multiple univariate analyses. Given our small sample size, we employed the MMPC variable selection algorithm to identify predictor variables significantly related to mean changes. Results: Significant alterations in ECG intervals and heart rate were noted in the subjects before and after the first EMF exposure cycle, independent of their BMI. Notably, heart rate, P-R, and QRS intervals fell postexposure while QT and ST intervals increased. These changes were influenced by variations in systolic blood pressure, with BMI showing no significant effect. Conclusion: The observed modifications in cardiac electrical measurements due to mobile phone EMF exposure are attributed to the effects of EMF itself, with no impact from BMI on the extent of these changes. regulatoryinfo.apple.com Open access paper: onlinelibrary.wiley.com
AI evidence extraction
Main findings
In multivariate analysis of pre/post differences, the study reports significant alterations in ECG intervals and heart rate after the first exposure cycle, independent of BMI. Heart rate, P-R, and QRS decreased postexposure, while QT and ST increased; changes were reported to be influenced by systolic blood pressure, with BMI showing no significant effect.
Outcomes measured
- ECG intervals (P-R, QRS, QT, ST)
- Heart rate (HR)
- Influence of systolic blood pressure on changes
- Influence of BMI on changes
Limitations
- Small sample size (n=20)
- Only healthy male subjects were included
- Exposure details (frequency, SAR, and duration) are not specified in the abstract
- Uses previously collected data from a prior study (secondary analysis)
- Significant findings are described primarily for the first exposure cycle; results across all four cycles are not fully detailed in the abstract
Suggested hubs
-
cell-phones
(0.95) Study examines cardiac electrical measurements before/after exposure to mobile phone EMF.
View raw extracted JSON
{
"publication_year": 2024,
"study_type": "other",
"exposure": {
"band": "RF",
"source": "mobile phone",
"frequency_mhz": null,
"sar_wkg": null,
"duration": "Four exposure cycles (timing not specified)"
},
"population": "20 healthy male subjects",
"sample_size": 20,
"outcomes": [
"ECG intervals (P-R, QRS, QT, ST)",
"Heart rate (HR)",
"Influence of systolic blood pressure on changes",
"Influence of BMI on changes"
],
"main_findings": "In multivariate analysis of pre/post differences, the study reports significant alterations in ECG intervals and heart rate after the first exposure cycle, independent of BMI. Heart rate, P-R, and QRS decreased postexposure, while QT and ST increased; changes were reported to be influenced by systolic blood pressure, with BMI showing no significant effect.",
"effect_direction": "harm",
"limitations": [
"Small sample size (n=20)",
"Only healthy male subjects were included",
"Exposure details (frequency, SAR, and duration) are not specified in the abstract",
"Uses previously collected data from a prior study (secondary analysis)",
"Significant findings are described primarily for the first exposure cycle; results across all four cycles are not fully detailed in the abstract"
],
"evidence_strength": "low",
"confidence": 0.7399999999999999911182158029987476766109466552734375,
"peer_reviewed_likely": "yes",
"stance": "concern",
"stance_confidence": 0.6999999999999999555910790149937383830547332763671875,
"summary": "This study reanalyzed previously collected data from 20 healthy men exposed to mobile phone RF-EMF with phones placed at four body locations, using multivariate methods and variable selection. It reports significant pre/post changes in ECG intervals and heart rate after the first exposure cycle, with HR, P-R, and QRS decreasing and QT and ST increasing. The reported changes were associated with systolic blood pressure variation, while BMI was not a significant modifier.",
"key_points": [
"The study analyzes mobile phone RF-EMF exposure effects on ECG intervals (P-R, QRS, QT, ST) and heart rate using a multivariate approach.",
"Data came from 20 healthy male subjects with phones placed at four different body locations.",
"A one-sample Hotelling T2 test was used to assess the mean vector of pre/post differences rather than multiple paired t-tests.",
"Significant alterations were reported after the first exposure cycle, including decreased HR, P-R, and QRS and increased QT and ST.",
"Systolic blood pressure variation was reported to influence the observed changes.",
"BMI was reported to have no significant effect on the extent of changes.",
"The abstract does not provide key exposure parameters such as frequency, SAR, or exposure duration."
],
"categories": [
"Mobile Phones",
"Radiofrequency (RF)",
"Cardiovascular/ECG",
"Human Study"
],
"tags": [
"Mobile Phone Exposure",
"Radiofrequency EMF",
"Electrocardiogram",
"Heart Rate",
"Heart Rate Variability",
"PR Interval",
"QRS Duration",
"QT Interval",
"ST Segment",
"Blood Pressure",
"Body Mass Index",
"Multivariate Analysis",
"Hotelling T2 Test",
"Variable Selection"
],
"keywords": [
"mobile phone",
"RF-EMF",
"ECG",
"heart rate",
"P-R",
"QRS",
"QT",
"ST",
"systolic blood pressure",
"BMI",
"Hotelling T2",
"MMPC"
],
"suggested_hubs": [
{
"slug": "cell-phones",
"weight": 0.9499999999999999555910790149937383830547332763671875,
"reason": "Study examines cardiac electrical measurements before/after exposure to mobile phone EMF."
}
],
"social": {
"tweet": "Reanalysis of data from 20 healthy men reports significant pre/post changes in ECG intervals and heart rate after mobile phone RF-EMF exposure (first cycle), with effects linked to systolic blood pressure but not BMI. doi:10.1155/2024/7093771",
"facebook": "A 2024 multivariate reanalysis of 20 healthy male participants reports changes in ECG intervals and heart rate after mobile phone RF-EMF exposure, with systolic blood pressure influencing the changes while BMI did not. doi:10.1155/2024/7093771",
"linkedin": "Study (2024) reanalyzes prior data using Hotelling T2 and variable selection, reporting significant ECG interval and heart rate changes after mobile phone RF-EMF exposure (notably in the first cycle), influenced by systolic blood pressure but not BMI. doi:10.1155/2024/7093771"
}
}
AI can be wrong. Always verify against the paper.
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