Mark D Ghamsary

Dr. Mark D Ghamsary


Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 June 2017 in Environmental Health
Verified
Journal Article
Open access
PDF file
LGLida Gharibvand
Lida Gharibvand
LBLarry Beeson
Larry Beeson
DSDavid Shavlik
David Shavlik
RKRaymond Knutsen
Raymond Knutsen
MGMark D Ghamsary
Mark D Ghamsary
SKSynnove F. Knutsen
Synnove F. Knutsen
Adenocarcinoma (AC) is the most common lung cancer among non-smokers, but few studies have assessed the effect of PM2.5 on AC among never smokers. The purpose of this study was to assess the association between ambient PM2.5 and incident lung AC in the Adventist Health and Smog Study-2 (AHSMOG-2), a cohort of 80,044 non-smokers (81% never smokers) followed for 7.5 years (597,177 person-years) (2002–2011). Incident lung AC was identified through linkage with U.S. state cancer registries. Ambient PM2.5 levels at subjects’ residences were estimated for the years 2000 and 2001, immediately prior to study start. A total of 164 incident lung AC occurred during follow-up. Each 10 μg/m3 increment in PM2.5 was associated with an increase in the hazard rate of lung AC [HR = 1.31 (95% confidence interval (CI) 0.87–1.97)] in the single-pollutant model. Excluding those with prevalent non-melanoma skin cancer (NMSC) strengthened the association with lung AC (HR = 1.62 (95% CI, 1.11–2.36) for each 10 μg/m3 PM2.5 increment. Also, limiting the analyses to subjects who spent more than 1 h/day outdoors, increased the estimate (HR = 1.55, 95% CI: 1.05, 2.30). Increased risk of AC was observed for each 10 μg/m3 increment in ambient PM2.5 concentrations. The risk was higher among those without prevalent NMSC and those who spent more than 1 h/day outdoors.

15 July 2016 in BMC Health Services Research
Verified
Journal Article
Open access
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MRMitra Rashidian
Mitra Rashidian
VMVictor Minichiello
Victor Minichiello
SKSynnove F. Knutsen
Synnove F. Knutsen
MGMark D Ghamsary
Mark D Ghamsary
Despite increasing numbers of Iranian-American physicians practicing in the United States, little is known about the barriers that may impact them as providers of sexual health care. This is an important topic as discussions of sexual topics are generally considered a taboo among Iranians. We aimed to identify barriers experienced by Iranian-American physicians that inhibit their willingness to engage in discussions of sexual health care with patients. In 2013, a self-administrated questionnaire was sent to 1,550 Iranian-American physicians in California. Questions included demographics of the physicians as well as their perception of challenges in discussing various sexual health topics with their patients. Factor analysis: Principal components approach with a Varimax rotation was used to detect latent factors within the data that may help explain possible barriers to discussion of sexual health among physicians. The analysis was performed on 11 items, specifically focused on possible barriers, to detect a possible relationship between correlated variables within the data to produce a set of uncorrelated variables (factors). The overall response rate was 23 %. Data revealed specific barriers regarding sexual history taking, discussing STIs and sexual dysfunctions with patients based on their gender, and age. Three factors were identified as internally consistent (Cronbach’s alpha = 0.82 to 0.91): (i) embarrassment, (ii) cultural and religious, (iii) lack of time and financial constraint. Significant associations were found between these 3 factors and some variables such as: country of medical graduation, religious affiliation, birthplace, age, and gender. Our findings are the first to identify possible barriers among Iranian-American physicians in delivering effective sexual health care to patients. Additional studies from Iranian-American physicians as well as from other foreign-born/subpopulation of US physicians populations and mainstream US physicians are needed to assess the extent of such barriers, and changes over time. Effective strategies to better engage such physicians in these studies are needed. If confirmed from other studies, our findings could have implications for the training of US medical graduates.

31 January 2024 in Lipids in Health and Disease
Verified
Journal Article
Open access
PDF file
ATAlireza Takhttavous
Alireza Takhttavous
MSMaryam Saberi-Karimian
Maryam Saberi-Karimian
SHSomayeh Ghiasi Hafezi
Somayeh Ghiasi Hafezi
HEHabibollah Esmaily
Habibollah Esmaily
MHMarzieh Hosseini
Marzieh Hosseini
MAMaryam Alinezhad-Namaghi
Maryam Alinezhad-Namaghi
Background: The aim was to establish a 10-year dyslipidemia incidence model, investigating novel anthropometric indices using exploratory regression and data mining. Methods: This data mining study was conducted on people who were diagnosed with dyslipidemia in phase 2 (n = 1097) of the Mashhad Stroke and Heart Atherosclerotic Disorder (MASHAD) study, who were compared with healthy people in this phase (n = 679). The association of dyslipidemia with several novel anthropometric indices including Conicity Index (C-Index), Body Roundness Index (BRI), Visceral Adiposity Index (VAI), Lipid Accumulation Product (LAP), Abdominal Volume Index (AVI), Weight-Adjusted-Waist Index (WWI), A Body Shape Index (ABSI), Body Mass Index (BMI), Body Adiposity Index (BAI) and Body Surface Area (BSA) was evaluated. Logistic Regression (LR) and Decision Tree (DT) analysis were utilized to evaluate the association. The accuracy, sensitivity, and specificity of DT were assessed through the performance of a Receiver Operating Characteristic (ROC) curve using R software. Results: A total of 1776 subjects without dyslipidemia during phase 1 were followed up in phase 2 and enrolled into the current study. The AUC of models A and B were 0.69 and 0.63 among subjects with dyslipidemia, respectively. VAI has been identified as a significant predictor of dyslipidemias (OR: 2.81, (95% CI: 2.07, 3.81)) in all models. Moreover, the DT showed that VAI followed by BMI and LAP were the most critical variables in predicting dyslipidemia incidence. Conclusions: Based on the results, model A had an acceptable performance for predicting 10 years of dyslipidemia incidence. Furthermore, the VAI, BMI, and LAP were the principal anthropometric factors for predicting dyslipidemia incidence by LR and DT models.

1 May 2025 in Environmental Science and Pollution Research
Verified
Journal Article
Closed access
PDF file
SASamaneh Sadat Ariapak
Samaneh Sadat Ariapak
AJAhmad Jalalian
Ahmad Jalalian
NHNaser Honarjoo
Naser Honarjoo
MGMark D Ghamsary
Mark D Ghamsary

3 December 2025 in Biomedicines
Verified
Journal Article
Open access
PDF file
KSKyan Sahba
Kyan Sahba
CWChristopher G. Wilson
Christopher G. Wilson
EGEvelen Gonzales
Evelen Gonzales
JHJamie Hankins
Jamie Hankins
HJHailey Jahromi
Hailey Jahromi
MBMark Bussell
Mark Bussell
Background: Diabetic peripheral neuropathy (DPN) is a prevalent complication of type 2 diabetes (T2D), associated with microvascular dysfunction and significant morbidity. Exercise is a cornerstone of diabetes care and has demonstrated benefits for neuropathic pain, whereas Intraneural FacilitationTM (INF®) therapy is a manual technique designed to enhance intraneural perfusion. This study compared the effects of INF® therapy and exercise on neuropathic pain qualities in adults with DPN. Methods: In this single-blinded randomized controlled trial, 38 adults with T2D and moderate to severe DPN were randomized to INF® therapy (n = 20) or standardized exercise (n = 18). Participants completed nine 60-min sessions over a period of six weeks. Neuropathic pain qualities were assessed using the Pain Quality Assessment Scale (PQAS) at baseline and post-treatment. Paired t tests, independent t tests, and linear mixed models adjusted for age and body-mass index (BMI) evaluated within- and between-group changes. Results: Both treatment groups demonstrated significant reductions in total PQAS scores (p = 0.001). INF® therapy produced improvements across paroxysmal, superficial, and deep pain domains, with reductions in descriptors such as shooting, sharp, electrical, numb, and unpleasant pain. Exercise led to selective improvements, including sharp, electrical, numb, sensitive, and unpleasant sensations associated with pain. Between-group analyses and mixed-effects models revealed no significant differences after adjusting for confounding factors. Conclusions: Both INF® therapy and exercise improved neuropathic pain qualities in adults with DPN. INF® therapy demonstrated broader within-group effects, suggesting its potential as a passive adjunct or alternative for patients unable to tolerate active exercise.

20 July 2023 in Research Square
Verified
Preprint
Open access
PDF file
SHSomayeh Ghiasi Hafezi
Somayeh Ghiasi Hafezi
MMMaryam Mohammadi-Bajgiran
Maryam Mohammadi-Bajgiran
ZKZahra Khorasanchi
Zahra Khorasanchi
SSSara Saffar Soflaei
Sara Saffar Soflaei
SESohrab Effati
Sohrab Effati
MGMajid Ghayour-Mobarhan
Majid Ghayour-Mobarhan
Background Due to the controversial effect of dietary fat intake on cardiovascular diseases (CVDs) risk, this study aimed to, adopt a new dynamic model that was tested and evaluated to estimate the effect of dietary fatty acids on the incidence of cardiovascular disease in the MASHAD cohort. Methods Total subjects of the Mashhad Stroke and Heart Atherosclerotic Disorder (MASHAD) study, 9704 subjects (of whom 233 developed CVD after 6 years with CVD) were recruited using a randomized clustering approach. Lipids profiles were taken after a 14 hours of overnight fast. 24-h recall questionnaire was used to measure the dietary intakes. A four-dimensional mathematical model based on the susceptible-exposed-infectious-recovered (SEIR) model in the dynamics of food intake was formulated for cardiovascular patients. Results Dietary saturated fatty acid (SFA), polyunsaturated fatty acid (PUFA) and monounsaturated fatty acid (MUFA) had an effect on the HDL in women and dietary trans fatty acid (TFA) and cholesterol had an effect on serum LDL, had the greatest effect on the CVDs. In addition, among other dietary fatty acids, cholesterol and TFA had the most and least effect on the incidence of CVDs in dyslipidemia patients, respectively. Regardless of the effect of fatty acids intake on lipid profile, which is more evident in females, CVDs were more in males. Conclusion Our models showed that higher intake of MUFA, PUFA as well as lower intake of SFA had a significant effect on serum HDL in women and among other dietary factors, had the most effect on the occurrence of CVDs.