Education

• PhD, Graduate Institute of Statistics, National Central University, Taiwan, ROC
• MPhil, Graduate Institute of Statistics, National Central University, Taiwan, ROC
• BSc, Department of Business Mathematics, Soochow University, Taiwan, ROC
   

Previous academic positions

• Associate Professor, Department of Applied Mathematics, National Hsinchu University of Education, 2006-2016.
• Associate Professor, Department of Business Administration, Vanung University, 2005-2006
• Assistant Professor, Department of Business Administration, Vanung University, 2004-2005
• Assistant Professor, Department of Business Administration, Vanung Institute of Technology, 2000-2004
   

Specialization

• Reliability analysis
• cluster analysis
• gerontology
• substance use
   

Publications

• Yen‑Han Lee*, Stephan Arndt, Christopher Joji, Hannah Fleischer, Mack Shelley, Ching‑Ti Liu, and Yen‑Chang Chang* (2025). Hallucinogen Use and Associated Illicit Drug Use and Prescription Drug Misuse Among Adults in the USA: Results from a National Survey. International Journal of Mental Health and Addiction. DOI: 10.1007/s11469-025-01506-1. (SSCI)
• Yen-Han Lee*, Huyen Tran, Pei-Ying Lin, Mack Shelley, and Yen-Chang Chang* (2025). Racial and ethnic differences in how mental health, alcohol and drug use, and financial condition were affected by COVID-19. Journal of Substance Use. DOI: 10.1080/14659891.2025.2460803. (SCIE)
• Yen-Han Lee*, Yen-Chang Chang*, Yu-Chi Chi, Mack Shelleyd, and Stephan Arndt (2025). Perception of hallucinogen use risks and associated hallucinogen use in the United States: results from a large national sample. Journal of substance use, 30, 301-308. (SSCI)
• Yen-Han Lee, Yen-Chang Chang, Mack Shelley, and Humberto López Castillo* (2024). Sexual minority identifiers and their perception of illicit drug use risks in the US: Results from a National Survey. Journal of Psychiatric Research, 175, 183-191. (SSCI)
• Yen‑Han Lee*, Timothy Chiang, Cai Xu, Mack Shelley, Ashish Kalidindi, and Yen‑Chang Chang* (2024). Behavioral change in fruit and vegetable consumption and associated cognitive impairment among Chinese older adults. European Geriatric Medicine, 15(6): 1749-1761. (SCIE)
• Yen‑Chang Chang, Yen‑Han Lee*, Timothy Chiang, and Ching‑Ti Liu (2024). Associations of Smoking and Alcohol Consumption with Loneliness, Depression, and Loss of Interest Among Chinese Older Males and Females. International Journal of Mental Health and Addiction, 22, 1047-1062. (SSCI).
• Yen-Han Lee*, Chase Woods, Mack Shelley, Stephan Arndt, Ching-Ti Liu, and Yen-Chang Chang* (2024). Racial and Ethnic Disparities and Prevalence in Prescription Drug Misuse, Illicit Drug Use, and Combination of Both Behaviors in the United States. International Journal of Mental Health and Addiction, 22, 3818-3834. (SSCI)
• Pei-Ying Lin, Yen-Han Lee*, Ren-Siang Wang, Tze-Yin Chen, Yi-Jing Li, Yu-Hsuan Wu, Teh-Fu Hsu, and Yen-Chang Chang (2024). Correlates of the Veterans Visiting Emergency Departments in Taiwan: A Comparison Before and After the Coronavirus Disease 2019 Pandemic. Military Medicine, 189(1-2):e148-e156. (SCIE)
• Yen-Han Lee*, Yen-Chang Chang, Anas Khurshid Nabil, and Adam E. Barry (2024). Self-reported reasons for opioid and analgesic misuse among participants without cancer in the United States. Journal of Substance Use, 29, 433-439. (SSCI)
• Yen-Han Lee*, Yen-Chang Chang, Michael J. Rovito, and Mack Shelley (2024). Association between tobacco and alcohol consumption behavioral variation and healthcare expenses among Chinese older adults. International Journal of Healthcare Management. DOI: 10.1080/20479700.2024.2323859.
• Yen-Han Lee*, Karuna Kumwiang, Timothy Chiang, Mack Shelley, and Yen-Chang Chang* (2024). Twenty-Year Trends and Urban–Rural Disparities in Smoking, Alcohol Consumption, and Dual Consumption Among Chinese Older Adults. International Journal of Mental Health and Addiction, DOI: 10.1007/s11469-024-01362-5.
• Yen-Han Lee*, Yen-Chang Chang, Yu-Chi Chi, and Mack Shelley (2023). Does urban-rural disparity exist in nicotine and alcohol dependence among Chinese older adults? Addiction Research & Theory, 31(5): 361-369. (SSCI)
• Yen-Han Lee*, Trishnee Bhurosy, Yen-Chang Chang, Ching-Ti Liu, and Mack Shelley (2023). Associations of alcohol consumption and dietary behaviors with severe cognitive impairment among Chinese older men and women. Journal of substance use, 28(2), 235-242. (SSCI)
• Yen‑Han Lee*, Yu‑Hsuan Wu, Mack Shelley, Stephan Arndt, Yen‑Chang Chang* (2023). The effects of cigarette smoking, alcohol consumption, and use of both cigarettes and alcohol on Chinese older adults’sleep: results from a longitudinal study. International Journal of Mental Health and Addiction, 21, 1914-1930. (SSCI)
• Yen-Han Lee*, Dexia Kong, Cheng-Ming Hu, and Yen-Chang Chang (2023). Participation in mahjong and the associated smoking and alcohol consumption behaviors among Chinese older adults. DOI: 10.1080/15332640.2023.22.
• Yen-Chang Chang* and Ching-Ti Liu* (2022). A Stochastic Multi-Strain SIR Model with Two-Dose Vaccination Rate. Mathematics, 10, 1804. (SCIE)
• Yi-Ting Hana Lee, Yen-Han Lee*, Yu-Hsuan Wu, Ching-Ti Liu, and Yen-Chang Chang* (2022). A 10-year Trend of Sleeping Patterns, Geographical, and Community Disparities Among Chinese Older Adults. Journal of Applied Gerontology, 41(5): 1301-1311. (SSCI)
• Yen‑Han Lee*, Dexia Kong, Yi‑Ting Hana Lee, Chia‑Hung Lin, Ching‑Ti Liu, and Yen‑Chang Chang* (2022). Functional disabilities and changes in sleep quality and duration among older adults: results from a longitudinal study in China, 2005–2014. European Geriatric Medicine, 13(4), 967-975. (SCIE)
• Yen-Han Lee*, Yen-Chang Chang, Po-Ju Chang, and Mack Shelley (2022). Socio-demographic and behavioural factors associated with status change of sleep quality and duration among Chinese older adults. Ageing & Society, 42(9), 2206-2223. (SSCI)
• Yen-Han Lee*, Yi-Ting Hana Lee, Yen-Chang Chang, Ching-Ti Liu, and Stephan Arndt (2022). Association between medical marijuana legalization and sources of obtaining marijuana among adults in the United States. Journal of substance use, 27(1): 27-33. (SSCI)
• Yen-Han Lee*, Yen-Chang Chang, Mack Shelley, and Ching-Ti Liu (2022). Factors Associated with Preventive Care Utilisation among Chinese Older Adults: Evidence from the 2018 Chinese Longitudinal Healthy Longevity Survey. Social Policy and Society, 23(2):314-329.
• Yen-Han Lee*, Chia-Hung Lin, Jia-Ren Chang, Ching-Ti Liu, Mack Shelley, and Yen-Chang Chang* (2021). Transition of Living Arrangement and Cognitive Impairment Status among Chinese Older Adults: Are They Associated? Medicina, 57, 961. (SCIE)
• Yen-Han Lee*, Peiyi Lu, Yen-Chang Chang, Mack Shelley, Yi-Ting Lee, and Ching-Ti Liu (2021). Associations of alcohol consumption status with activities of daily living among older adults in China. Journal of Ethnicity in Substance Abuse, 20(3): 428-443. (SSCI)
• Yen-Han Lee*, Yen-Chang Chang*, Warren Kaplan, Mack Shelley, and Ching-Ti Liu (2021). Do Chinese Older Adults Rely on Social Insurance Schemes? Primary Coverage on out-of-Pocket Medical Expenses for Outpatient and Inpatient Treatments. Journal of Social Service Research, 47(3), 343-356. (SSCI)
• Yen-Han Lee*, Ting Fang Alvin Ang, Hsien-Chang Lin, and Yen-Chang Chang (2021). Rural-urban disparities in smoking patterns among Chinese adults: a social-ecological approach. Journal of Ethnicity in Substance Abuse, 20(2): 241-256. (SSCI)
• Hao Fan, Yen-Han Lee*, Yen-Chang Chang, and Mack Shelley (2021). Associations of dietary habits and sleep in older adults: a 9-year follow-up cohort study. European Geriatric Medicine, vol 12, 123-131. (SCIE)
• Wen-Liang Hung*, Jenn-Hwai Yang, I-Wen Song, and Yen-Chang Chang (2021). A modified self-updating clustering algorithm for application to dengue gene expression data. Communications in Statistics – Simulation and Computation, 50(2), 483-500. (SCIE)
• Yen-Han Lee*, Yen-Chang Chang, Ting Fang Alvin Ang, Timothy Chiang, Mack Shelley and Ching-Ti Liu (2021). Associations of staple food consumption and types of cooking oil with waist circumference and body mass index in older Chinese men and women: a panel analysis. International Health,13:178–187. (SSCI)
• Yen-Han Lee*, Ching-Ti Liu, Mack Shelley, and Yen-Chang Chang (2021). Regional and Geographical Disparities in Body Mass Index (BMI) Among Chinese Older Adults: The Chinese Longitudinal Healthy Longevity Survey. Journal of Applied Gerontology, 40(9), 1116-1125.
• Yen-Han Lee*, Yen-Chang Chang, Stephan Arndt, Mack Shelley & Ching-Ti Liu (2020, Jul). Weekly marijuana use and health-related measurements among adults in the United States: a longitudinal study. Drugs: Education, Prevention and Policy, 27(5), 397-406. (SSCI)
• Yen-Han Lee*, Yen-Chang Chang, Yun-Ting Wang and Mack Shelley (2020, Jul). Have the Chinese Older Adults Received Adequate Healthcare Services since the 2009 Health Reform? Examining the Socioeconomic Disparity in Receiving Adequate Healthcare. Healthcare, 8, 208. (SSCI)
• Yen-Han Lee*, Yen-Chang Chang, Ching-Ti Liu and Stephan Arndt (2020, Jul). Is medical marijuana legalization associated with prescription drug misuse, illicit drug use, or combination of both among adults in the United States? Journal of Drug Issues, 50(4): 566-578. (SSCI)
• Jen-Hao Chen, Yen-Chang Chang and Wen-Liang Hung* (2020). A self-organizing clustering algorithm for functional data. Communications in Statistics – Simulation and Computation, 49(5): 1237-1263. (SCIE)
• Yen-Han Lee*, Yen-Chang Chang, & Mack C Shelley (2020). Is preventive care utilization associated with lower outpatient and inpatient healthcare expenses among Chinese older adults? A longitudinal analysis. International Journal of Health Planning and Management, 35(1):142–155. (SSCI).
• Yen-Han Lee*, Yen-Chang Chang & Warren A. Kaplan (2020). Social insurance and older adults in China: effect of education and household income on coverage following the 2009 health reform. Journal of Social Service Research, 46(4): 496-506. (SSCI).
• Yen-Han Lee*, Yen-Chang Chang*, Mack C Shelley, & Ching-Ti Liu (2020, Aug). Examining the associations of smoking behavior and obesity among older adults in China: Should we consider food consumption behaviors? Journal of Aging and Health, 32(7-8):904-915 (SSCI).
• Yen-Han Lee*, Yen-Chang Chang, Timothy C. Chiang, Ching-Ti Liu, Mack Shelley (2020, Sep). Living arrangements and sleep-related outcomes among older adults in China: a panel analytic Approach. International Journal of Aging and Human Development, 91(2): 111-126 (SSCI)
• Yen-Han Lee*, Yen-Chang Chang*, Yi-Ting Hana Lee, Ching-Ti Liu & Mack Shelley (2020). Are older adults’ home exposures to secondhand smoking during earlier life stages associated with current health status and life satisfaction in China? A multilevel approach. Journal of Ethnicity in Substance Abuse, 19(3), 388-402. (SSCI).
• Yen-Han Lee*, Yen-Chang Chang*, Ching-Ti Liu, and Mack Shelley (2020). Correlates of alcohol consumption and alcohol dependence among older adults in contemporary China: Results from the Chinese Longitudinal Healthy Longevity Survey. Journal of Ethnicity in Substance Abuse, 19(1), 70-85. (SSCI)
• Yen-Han Lee*, Timothy Chiang, Elizabeth Kwon, Sohye Baik, and Yen-Chang Chang (2020). Trends and sociodemographic factors of e-cigarette use among adult daily smokers in South Korea. International Journal of Health Planning and Management, 35(4): 960–969 (SSCI).
• Yen-Han Lee*, Yen-Chang Chang, Mack Shelley, and Ching-Ti Liu (2020). A panel analysis of the Mahjong card game and social activity with sleep-related measurements among Chinese older adults. Sleep and Biological Rhythms, 18, 109-119. (SCIE)
• Yen-Han Lee*, Yen-Chang Chang, and Ching-Ti Liu (2019). Preventative care utilization and associated health related measurements among older adults ‐ following the 2009 health reform in China. The International Journal of Health Planning and Management, 34(2): e1135-e1148. (SSCI)
• Yen-Chang Chang*, Yen-Han Lee*, Ching-Ti Liu, and Mack Shelley (2019). Patterns of e-cigarette use and self-reported health outcomes among smokers and non-smokers in the United States: A preliminary assessment. Journal of substance use, 24(1): 79-87 (SSCI).
• Yen-Han Lee*, Yen-Chang Chang*, Ching-Ti Liu, and Mack Shelley (2019). Evaluating the associations of consumption of non-red meat protein sources and flavor preferences on sleeping patterns among older adults in China. Sleep and Biological Rhythms, 17(1), 79-92. (SCIE)
• Yen-Han Lee*, Timothy C. Chiang, Ching-Ti Liu, and Yen-Chang Chang* (2018). Investigating adolescents’ sweetened beverage consumption and Western fast food restaurant visits in China, 2006–2011. International Journal of Adolescent Medicine and Health. DOI: 10.1515/ijamh-2017-0209.
• Yen-Han Lee*, Yen-Chang Chang*, Yi-Ting Lee, Mack Shelley, and Ching-Ti Liu (2018). Dietary patterns with fresh fruits and vegetables consumption and quality of sleep among older adults in mainland China. Sleep and Biological Rhythms, 16(3), 293-305. (SCIE)
• Yen-Han Lee*, Mack Shelley, Ching-Ti Liu and Yen-Chang Chang (2018). Assessing the Association of Food Preferences and Self-Reported Psychological Well-Being among Middle-Aged and Older Adults in Contemporary China-Results from the China Health and Nutrition Survey. International Journal of Environmental Research and Public Health, 15(3), 463.
• Jen-Hao Chen, Yen-Chang Chang, and Wen-Liang Hung* (2018). A robust automatic clustering algorithm for probability density functions with application to categorizing color images. Communications in Statistics – Simulation and Computation, 47(7): 2152-2168.(SCIE)
• Wei-Ting Hung, Tzong-Ru Tsai, and Yen-Chang Chang* (2017). Periodical preventive maintenance contract for leased equipment with random failure penalties. Computers & Industrial Engineering, 113C: 437-444. (SCIE)
• Cheng-Wen Chang*, David M. Chiang, Andy Wei-Di Wu, and Yen-Chang Chang (2011). Identifying critical features of complex systems under prior known conditions. Computers & Industrial Engineering, 61: 788-793. (SCIE)
• Wen-Liang Hung* and Yen-Chang Chang (2011). Comparison between method of moments and entropy regularization algorithm applied to parameter estimation for mixed-Weibull distribution. Journal of Applied Statistics, 38: 2709-2722. (SCIE)
• Wen-Liang Hung*, Yen-Chang Chang, and E. Stanley Lee (2011). Weight selection in W-K-means algorithm with an application in color image segmentation. Computers and Mathematics with Applications, 62: 668-676. (SCIE)
• Ing-Guey Jiang, Li-Chin Yeh, Yen-Chang Chang, and Wen-Liang Hung (2010). On the fundamental mass-period functions of extrasolar planets. The Astronomical Journal Supplement Series, 186: 48-62. (SCIE)
• Cheng-Wen Chang*, David M. Chiang, Yen-Chang Chang, and Nian-Ze Hu (2010). Critical equipment decision support system for process layout environment: a case of wafer fab. International Journal of Industrial Engineering, 17(3), 223-235.
• Ing-Guey Jiang, Li-Chin Yeh, Yen-Chang Chang, and Wen-Liang Hung (2009). Construction of coupled period-mass functions in extrasolar planets through the nonparametric approach. The Astronomical Journal, 137: 329-336. (SCIE)
• Yen-Chang Chang and Ching-Ti, Liu* (2009). A generalized JM model with applications to imperfect debugging in software reliability. Applied Mathematical Modelling 33: 3578-3588. (SCIE)
• Yen-Chang Chang*, Ching-Ti Liu, and Wen-Liang Hung (2009). Optimization of process parameters using weighted convex loss functions. European Journal of Operational Research 196: 752-763. (SCIE)
• Yen-Chang Chang, Cheng-Wen Chang, and Wen-Liang Hung (2008). Determining the optimal process means under mixture normal distributions. Quality & Quantity, 42: 711-718. (SCIE)
• Wen-Liang Hung*, Yen-Chang Chang, and Shun-Chin Chuang (2008). Fuzzy classification maximum likelihood algorithms for mixed-Weibull distributions. Soft Computing, 12: 013-1018. (SCIE)
• Yen-Chang Chang and Wen-Liang Hung (2007). LINEX loss functions with applications to determining the optimum process parameters. Quality & Quantity.41: 291-301. (SCIE)
• Ching-Ti Liu and Yen-Chang Chang* (2007). A reliability-constrained software release policy using a non-Gaussian Kalman filter model. Probability in the Engineering and Informational Sciences. 21: 301-314. (SCIE)
• Ing-Guey Jiang, Li-Chin Yeh, Yen-Chang Chang, and Wen-Liang Hung (2007). On the mass-period distributions and correlations of extrasolar planets. The Astronomical Journal. 134: 2061-2066. (SCIE)
• Wen-Liang Hung* and Yen-Chang Chang (2006). A modified fuzzy c-means algorithm for differentiation in MRI of ophthalmology. MDAI 2006, Lecture notes in artificial Intelligence 3885, 340-350. 
• Yen-Chang Chang* and Wen-Liang Hung (2006). Software release policies on a shot noise process model. Applied Mathematics and Computation. 171(2): 746-759. (SCIE)
• Yen-Chang Chang* (2004). A sequential software release policy. Ann. Inst. Statist. Math. 56(1), 193-204. (SCIE) 
• Yen-Chang Chang & Lii-Yuh Leu* (1998). A state space model for software reliability. Ann. Inst. Statist. Math , 50(4):4, 789-799. (SCIE)
  
  

Classes taught

• Statistical Thinking and Analysis
• Mathematical and scientific thinking