Chan Shen

Dr. Chan Shen

orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

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

Representative Publications

View All Publications
16 January 2014 in BMC Psychiatry
Verified
Journal Article
Open access
PDF file
RBRituparna Bhattacharya
Rituparna Bhattacharya
CSChan Shen
Chan Shen
Usha SambamoorthiUsha Sambamoorthi
Usha Sambamoorthi
Depression and anxiety have been reported to be associated with chronic physical conditions. We examined the excess risk of chronic physical conditions associated with depression and/or anxiety within a multivariate framework controlling for demographic and modifiable lifestyle risk factors. We used a retrospective cross-sectional study design. Study participants were adults aged 22–64 years from 2007 and 2009 Medical Expenditure Panel Survey. We defined presence of depression-anxiety based on self-reported depression and anxiety and classified adults into 4 groups: 1) depression only; 2) anxiety only; 3) comorbid depression and anxiety 4) no depression and no anxiety. We included presence/absence of arthritis, asthma, chronic obstructive pulmonary disorder, diabetes, heart disease, hypertension, and osteoporosis as dependent variables. Complementary log-log regressions were used to examine the excess risk associated with depression and/or anxiety for chronic physical conditions using a multivariate framework that controlled for demographic (gender, age, race/ethnicity) and modifiable lifestyle (obesity, lack of physical activity, smoking) risk factors. Bonferroni correction for multiple comparisons was applied and p ≤0.007 was considered statistically significant. Overall, 7% had only depression, 5.2% had only anxiety and 2.5% had comorbid depression and anxiety. Results from multivariable regressions indicated that compared to individuals with no depression and no anxiety, individuals with comorbid depression and anxiety, with depression only and with anxiety only, all had higher risk of all the chronic physical conditions. ARRs for comorbid depression and anxiety ranged from 2.47 (95% CI: 1.47, 4.15; P = 0.0007) for osteoporosis to 1.64 (95% CI: 1.33, 2.04; P < 0.0001) for diabetes. Presence of depression only was also found to be significantly associated with all chronic conditions except for osteoporosis. Individuals with anxiety only were found to have a higher risk for arthritis, COPD, heart disease and hypertension. Presence of depression and/or anxiety conferred an independent risk for having chronic physical conditions after adjusting for demographic and modifiable lifestyle risk factors.

1 July 2016 in International Journal of Radiation Oncology, Biology, Physics
Verified
Journal Article
Closed access
LZLina Zhao
Lina Zhao
Shouhao ZhouShouhao Zhou
Shouhao Zhou
PBPeter Balter
Peter Balter
CSChan Shen
Chan Shen
DGDaniel R. Gomez
Daniel R. Gomez
JCJoe Y. Chang
Joe Y. Chang

7 January 2022 in Cancers
Verified
Journal Article
Open access
PDF file
MLMichael LaPelusa
Michael LaPelusa
CSChan Shen
Chan Shen
NANina D. Arhin
Nina D. Arhin
DCDana Cardin
Dana Cardin
MTMarcus Tan
Marcus Tan
CECathy Eng
Cathy Eng
Background: Early-onset pancreatic cancer (EOPC) is relatively uncommon. It is unclear if the incidence of EOPC is evolving and how these patients are treated. Methods: We conducted a retrospective, population-based study using SEER 2004–2016. We evaluated annual age-adjusted incidence rate (AAIR), stage at presentation, and race/ethnicity among 7802 patients plus treatment patterns in 7307 patients (excluding neuroendocrine tumors) younger than 50. Results: The AAIR was higher in males while the rate increased faster in females. The AAIR was highest in Non-Hispanic Black patients and increased for all races/ethnicities over time. The percentage of patients diagnosed with distant-stage disease decreased over time but increased for localized-stage disease. Hispanic patients made up a larger proportion of patients over time compared to other groups. For localized-stage disease, primary surgery alone was the most utilized modality of therapy. For regional-stage disease, chemotherapy with radiation was the most utilized modality from 2004–2010, whereas chemotherapy alone was the most utilized from 2011–2016. For distant-stage disease, chemotherapy alone was the most utilized and used increasingly over time. Patients with EOPC received radiation and chemotherapy at similar rates to, and underwent surgery more frequently, than patients 50–69. Conclusions: The AAIR of EOPC increased over time, faster so in females. Groups who experience a higher burden of pancreatic cancer, particularly African Americans, experienced a higher burden of EOPC. Treatment of localized and regional-stage disease did not follow standard treatment guidelines for pancreatic cancer. Our findings indicate that EOPC patients received more treatment than their older counterparts.

30 October 2020 in Annals of Surgical Oncology
Verified
Journal Article
Closed access
PDF file
Kelly StahlKelly Stahl
Kelly Stahl
WWWilliam Wong
William Wong
DDDaleela Dodge
Daleela Dodge
ABAshton Brooks
Ashton Brooks
CMChristopher McLaughlin
Christopher McLaughlin
CSChan Shen
Chan Shen

2 June 2020 in The Oncologist
Verified
Journal Article
Open access
PDF file
CSChan Shen
Chan Shen
JTJames Douglas Thornton
James Douglas Thornton
DGDian Gu
Dian Gu
DDDaleela Dodge
Daleela Dodge
Shouhao ZhouShouhao Zhou
Shouhao Zhou
SGSharon H. Giordano
Sharon H. Giordano
Introduction: This study examined the patterns of prolonged opioid use and the factors associated with higher risk of prolonged opioid use among opioid-naïve working-age patients with early-stage breast cancer. Methods: Using MarketScan data, the study identified 23,440 opioid-naïve patients who received surgery for breast cancer between January 2000 and December 2014 and filled at least one opioid prescription attributable to surgery. Prolonged opioid use was defined as one or more prescriptions for opioids within 90 to 180 days after surgery and defined extra-prolonged opioid use as one or more opioid prescriptions between 181 and 365 days after surgery. Multivariable logistic regressions were performed to ascertain factors associated with prolonged and extra-prolonged use of opioids. Findings: Of the 23,440 patients, 4,233 (18%) had prolonged opioid use, and 2,052 (9%) had extra-prolonged opioid use. Patients who received mastectomy plus reconstruction had the highest rate of prolonged opioid use (38%) followed by mastectomy alone (15%). A multivariable logistic regression confirmed that patients with mastectomy and reconstruction had the highest odds ratio of prolonged opioid use compared to lumpectomy and whole breast irradiation (adjusted odds ratio, 5.6; 95% confidence interval, 5.1–6.1). Mean daily opioid dose was consistently high without any obvious dosage reduction among patients with opioid use. Interpretation: This large observational study showed a high rate of prolonged opioid use among patients who received surgery for early-stage breast cancer and found significant difference in prolonged opioid use by treatment type.

24 December 2020 in Current Oncology
Verified
Journal Article
Open access
PDF file
Kelly StahlKelly Stahl
Kelly Stahl
EOElizabeth Olecki
Elizabeth Olecki
MDMatthew E. Dixon
Matthew E. Dixon
JPJune Peng
June Peng
MTMadeline B. Torres
Madeline B. Torres
CSChan Shen
Chan Shen
Gastric cancer is the third most common cause of cancer deaths worldwide. Despite evidence-based recommendation for treatment, the current treatment patterns for all stages of gastric cancer remain largely unexplored. This study investigates trends in the treatments and survival of gastric cancer. The National Cancer Database was used to identify gastric adenocarcinoma patients from 2004–2016. Chi-square tests were used to examine subgroup differences between disease stages: Stage I, II/III and IV. Multivariate analyses identified factors associated with the receipt of guideline concordant care. The Kaplan–Meier method was used to assess three-year overall survival. The final cohort included 108,150 patients: 23,584 Stage I, 40,216 Stage II/III, and 44,350 Stage IV. Stage specific guideline concordant care was received in only 73% of patients with Stage I disease and 51% of patients with Stage II/III disease. Patients who received guideline consistent care had significantly improved survival compared to those who did not. Overall, we found only moderate improvement in guideline adherence and three-year overall survival during the 13-year study time period. This study showed underutilization of stage specific guideline concordant care for stage I and II/III disease.