• 1999, Ph.D., Biostatistics, The Ohio State University, Columbus
• 1995, M.S., Statistics, The Ohio State University, Columbus
• 1993, B.S., Mathematics, The Ohio State University, Columbus

• Online textbook: Introduction to Regression Methods for Public Health Using R
• Online resource: An Introduction to R for Research
• PPH 7160: Advanced Biostatistics for Public Health Professionals, Master of Public Health Program, Department of Population and Public Health Sciences, Boonshoft School of Medicine (2016-2018, 2021-present) [Course developer & instructor, Wrote online textbook] (formerly PPH 7920-01: Applied Statistics Practicum)
• PPH 7010: Biostatistics for Health Professionals, Master of Public Health Program, Department of Population and Public Health Sciences, Boonshoft School of Medicine (2023-present) [Course instructor]
• PPH 7170: Public Health Epidemiology II, Master of Public Health Program, Department of Population and Public Health Sciences, Boonshoft School of Medicine (2015, 2016, 2017, 2022) [Co-course developer, Co-instructor, Instructor] (formerly PPH 7920-01)
• PPH 6200: Public Health Epidemiology, Master of Public Health Program, Department of Population and Public Health Sciences, Boonshoft School of Medicine (2020) [Co-instructor]
• Introduction to Research, Department of Psychiatry, Boonshoft School of Medicine (2015-2018, 2021, 2022, 2024) [Course development team member, Co-instructor]
• AL733: Language Development Methods. Payap University, Graduate Studies Center, Department of Linguistics, Chiang Mai, Thailand (2006) [Course developer & instructor]
• LD5342: Statistical Methods, Graduate Institute of Applied Linguistics, Dallas, TX (2002) [Instructor]

• Governing Councilor, Epidemiology Section, American Public Health Association (2023-2025)
• Chair, Faculty Promotions and Advancement Committee, Department of Population and Public Health Sciences, Boonshoft School of Medicine, Wright State University (2020-present)
• Chair, Curriculum Committee, Department of Population and Public Health Sciences, Boonshoft School of Medicine, Wright State University (2024-present)
• Member, Faculty Promotions and Advancement Committee, Boonshoft School of Medicine, Wright State University (2021-2025)
• Member, Bylaws Committee, Boonshoft School of Medicine, Wright State University (2023-2025)
• Member, Ethics Committee, Public Health - Dayton & Montgomery County (2022-present)

Textbook

Nahhas, RW. Introduction to Regression Methods for Public Health Using R. 2024. In press. CRC Press. (link)

Published articles with a PMID: My bibliography at My NCBI Collections

All articles (accepted, in press, and published):

Schindler E, Winner K, Nahhas RW, Maione G, Jamison A, Blankenship K. Proactive psychiatry: innovating the delivery of consultation-liaison services in a pediatric hospital.
Journal of the Academy of Consultation-Liaison Psychiatry. 2024: Jul 29:S2667-2960(24)00073-9. Online ahead of print.
DOI 10.1016/j.jaclp.2024.07.005. PMID 39084527.

Gainer D, Harrington MT, Nahhas RW, Sullenbarger J. Relationship between obesity and intellectual/developmental disability in an Ohio telepsychiatry clinic: a retrospective review.
Journal of Autism and Developmental Disorders. Published online 22 June 2024.
DOI 10.1007/s10803-024-06432-0. PMID 38907779.

Costin A, Fisher D, Harper B, Nahhas RW, Sullenbarger J. Climate change and mental health: an interactive educational session.
MedEdPORTAL. 2024: 20, 11418.
DOI 10.15766/mep_2374-8265.11418. PMID 38645713. PMCID PMC11026302.

Chan IL, Schwarz K, Weinstein N, Mansergh G, Nahhas RW, Gelaude D, Alexander R, Rodriguez L, Strauss W, Repetski T, Sullivan N, Long E, Evener SL, Garbarino A, Mercer Kollar LM. An evaluation of messages to promote parental intent to vaccinate children aged <12 years against COVID-19.
Public Health Reports. Published online 19 January 2024.
DOI 10.1177/00333549231218725. PMID 38240243. PMCID PMC10851906.

McClintock HF, Nahhas RW, Hinson-Enslin A. Depression as a mediator of the association between vision and/or hearing loss and recent substance use: NHANES 2013-2018.
Disability and Health Journal. Published online 19 December 2023.
DOI 10.1016/j.dhjo.2023.101575. PMID 38135562.

McClintock HF, Nahhas RW, Hinson-Enslin A. Cardiovascular disease and lifetime drug use among individuals with hearing and/or vision loss.
Journal of Substance Use. Published online 13 April 2023.
DOI 10.1080/14659891.2023.2199860.

Daniulaityte R, Nahhas RW, Silverstein S, Martins S, Carlson RG. Trajectories of non-prescribed buprenorphine and other opioid use: a multi-trajectory latent class growth analysis. Journal of Substance Use and Addiction Treatment. 2023: 142, 208973.
DOI 10.1016/j.josat.2023.208973. PMID 36804351. PMCID PMC10044504.

Orlowski M, Shermadou S, Lee M, Hinson-Enslin A, Nahhas RW. Adolescent self-efficacy mediates the relationship between perceived parenting practices and fruit and vegetable consumption in the FLASHE study. Health Education Journal. 2022, 81(7).
DOI 10.1177/00178969221125637.

Hinson-Enslin A, Nahhas RW, McClintock HF. Vision and hearing loss associated with lifetime drug use: NHANES 2013-2018.
Disability and Health Journal. 2022, 15(2):Supplement (101286).
DOI 10.1016/j.dhjo.2022.101286. PMID 35393249.

Gainer DM, Nahhas RW, Bhatt NV, McCormack J, McMerrill A, Sultan H. Factors associated with depression and anxiety symptoms among U.S. physicians during the first phase of the COVID-19 pandemic.
International Journal of Health Promotion and Education. 2022,62(5): 395–411.
DOI 10.1080/14635240.2022.2028264

Koskela A, Ducatman A, Schousboe JT, Nahhas RW, Khalil N. Perfluoroalkyl substances and abdominal aortic calcification.
Journal of Environmental and Occupational Medicine. Published online 06 Jan 2022.
DOI 10.1080/14635240.2022.2028264. PMID 35001069.

Gainer DM, Nahhas RW, Vanderhoof T, Silverstein SM, Wright MD, Vanderhoof SO, Miller SC. Exploring the interactions between non-medical methamphetamine use and prescribed buprenorphine or naltrexone in opioid use disorder treatment retention.
Substance Use and Misuse. 2021, 56(4):2160-2170.
DOI 10.1080/10826084.2021.1975747. PMID 34538204.

Welton RS, Ashai A, Virgo L, Nahhas RW. A mock morbidity and mortality conference: does it change providers’ behavior?
Academic Psychiatry. 2021, 45:460-462.
DOI 10.1007/s40596-021-01449-4. PMID 33837514.

Gainer D, Nahhas RW, Bhatt N, Merrill A, McCormack J. Association between proportion of workday treating COVID-19 and depression, anxiety, and PTSD outcomes in U.S. Physicians.
Journal of Occupational and Environmental Medicine. 2021, 63(2):89-97.
DOI 10.1097/JOM.0000000000002086. PMID 33201021.

Carlson RG, Daniulaityte R, Silverstein S, Nahhas RW, Martins S. Unintentional drug overdose: Is more frequent use of non-prescribed buprenorphine associated with lower risk of overdose?
International Journal of Drug Policy. 2020, 79:102722.
DOI 10.1016/j.drugpo.2020.102722. PMID 32311513.

Daniulaityte R, Nahhas RW, Silverstein S, Martins S, Zaragoza A, Moeller A, Carlson RG. Patterns of non-prescribed buprenorphine and other opioid use among individuals with opioid use disorder: A latent class analysis.
Drug and Alcohol Dependence. 2019, 204:107574.
DOI 10.1016/j.drugalcdep.2019.107574. PMID 31568934. PMCID PMC6886684.

Levy A, Nahhas RW, Sampang S, Jacobs K, Weston C, Cerny-Suelzer C, Riese A, Niedermier J, Munetz M, Shaw J, Mast R. Perceptions of residents and their training directors regarding wellness education, program support, and access to depression treatment: the DEPRESS-Ohio Study.
Academic Psychiatry. 2019, 43(5):488-493.
DOI 10.1007/s40596-019-01067-1. PMID 31037653.

Levy A, Nahhas RW, Sampang S, Jacobs K, Weston C, Cerny-Suelzer C, Riese A, Munetz M, Shaw J. Characteristics associated with depression and suicidal thoughts among medical residents: results from the DEPRESS-Ohio Study.
Academic Psychiatry. 2019, 43(5):480-487.
DOI 10.1007/s40596-019-01089-9. PMID 31290011.

Daniulaityte R, Juhascik MP, Strayer KE, Sizemore IE, Zatreh M, Nahhas RW, Harshbarger KE, Antonides HM, Martins SS, Carlson RG. Trends in fentanyl and fentanyl analogue-related overdose deaths - Montgomery County, Ohio, 2015-2017.
Drug and Alcohol Dependence. 2019, 128(1):116-120.
DOI 10.1016/j.drugalcdep.2019.01.045. PMID 30909018.

Lokala U, Lamy FR, Daniulaityte R, Sheth A, Nahhas RW, Roden J, Carlson RG, Yadav S. Global trends, local harms: availability of fentanyl-type drugs on the dark web and accidental overdoses in Ohio.
Computational and Mathematical Organization Theory. Published online Oct. 25, 2018.
DOI 10.1007/s10588-018-09283-0.

Wallace KD, Nahhas RW, Froehle AW, Khalil N. Age but not BMI predicts accelerated progression of KOA: Data from the Osteoarthritis Initiative.
The Ohio Journal of Public Health. 2018,1(1):24-28.
DOI 10.18061/ojph.v1i1.9047.

Khalil N, Wallace KD, Tahtamooni OT, Rogers NL, Nahhas RW. Association of secondhand smoke with increased sagittal abdominal diameter in the US population: NHANES 2011-2012.
Environmental Disease. 2018, 3(2):45-51.
DOI 10.4103/ed.ed_7_18.

Khalil N, Kaur B, Lawson A, Ebert J, Nahhas RW. Secondhand smoke exposure is associated with Autism Spectrum Disorder in U.S. males but not in females: results from the National Survey on Children's Health.
Environmental Disease. 2018, 3(1):8-17.
DOI 10.4103/ed.ed_2_18.

Daniulaityte R, Zatreh M, Lamy FR, Nahhas RW, Martins SS, Sheth A, Carlson RG. A Twitter-based survey on marijuana concentrate use.
Drug and Alcohol Dependence. 2018, 187:155-159.
DOI 10.1016/j.drugalcdep.2018.02.033. PMID 29669296. PMCID PMC5959780.

Guina J, Nguyen M, Farnsworth S, Nahhas RW. PTSD symptom severity, but not trauma type, predicts mental health help-seeking in the military.
Journal of Psychiatric Practice. 2018, 24(5):310-316.
DOI: 10.1097/PRA.0000000000000331. PMID 30427817.

Lamy FR, Daniulaityte R, Zatreh M, Nahhas RW, Sheth A, Martins SS, Boyer EW, Carlson RG. "You got to love rosin: Solventless dabs, pure, clean, natural medicine." Exploring Twitter data on emerging trends in Rosin Tech marijuana concentrates.
Drug and Alcohol Dependence. 2018, 183: 248–252.
DOI 10.1016/j.drugalcdep.2017.10.039. PMID 29306816. PMCID PMC5803369.

Khalil N, Honda M, Ebert J, Lee M, Koskela A, Hangartner T, Nahhas RW, Kannan K. Perfluoroalkyl substances, bone density, and cardio-metabolic risk factors in obese 8-12 year old children: a pilot study.
Environmental Research. 2018, 160:314-321.
DOI 10.1016/j.envres.2017.10.014. PMID 29040951.

Guina J, Nahhas RW, Sutton P, Farnsworth S. The influence of trauma type and timing on PTSD symptomology.
Journal of Nervous and Mental Disease. 2018, 206(1):72-76.
DOI 10.1097/NMD.0000000000000730. PMID 29271827.

Gspandl S, Peirson R, Nahhas RW, Skale T, Lehrer D. Comparing Global Assessment of Functioning (GAF) and World Health Organization Disability Assessment Schedule (WHODAS) 2.0 in schizophrenia.
Psychiatry Research. 2018, 259:251-253.
DOI 10.1016/j.psychres.2017.10.033. PMID 29091824.

Daniulaityte R, Lamy FR, Smith GA, Nahhas RW, Carlson RG, Thirunarayan K, Martins SS, Boyer EW, Sheth A. “Retweet to pass the blunt”: Analyzing geographic and content features of cannabis-related tweeting activity across the U.S.
Journal on Studies of Alcohol and Drugs. 2017, 78(6):910-915.
DOI 10.15288/jsad.2017.78.910. PMID 29087826. PMCID PMC5668996.

Guina J, Nahhas RW, Mata N, Farnsworth S. Which Posttraumatic Stress Disorder symptoms, trauma types, and substances correlate with suicide attempts in trauma survivors?
Primary Care Companion for CNS Disorders. 2017, 19(5).
PII: 17m02177. DOI 10.4088/PCC.17m02177. PMID 29099549.

Daniulaityte R, Lamy FR, Barrat M, Nahhas RW, Martins SS, Boyer EW, Sheth A, Carlson RG. Characterizing marijuana concentrate users: a web-based survey.
Drug and Alcohol Dependence. 2017, 178:399-407.
DOI 10.1016/j.drugalcdep.2017.05.034. PMID 28704769. PMCID PMC5567791.

Guina J, Nahhas RW, Welton RS. No role for benzodiazepines in posttraumatic stress disorder until supported by evidence.
Australasian Psychiatry. 2017, 25(4):415-416.
DOI 10.1177/1039856217711061. PMID 28747110.

Lamy FR, Daniulaityte R, Nahhas RW, Barratt MJ, Sheth A, Smith GA, Martins SS, Boyer EW, Carlson RG. Increase in synthetic cannabinoids-related harms: results from a longitudinal web-based content analysis.
International Journal of Drug Policy. 2017, 44:121-129.
DOI 10.1016/j.drugpo.2017.05.007. PMID 28578250. PMCID PMC5545681.

Green CL, Nahhas RW, Scoglio AA, Elman I. Post-traumatic stress symptoms in pathological gambling: potential evidence of anti-reward processes.
Journal of Behavioral Addictions. 2017, 6(1):98-101.
DOI 10.1556/2006.6.2017.006. PMID 28274137. PMCID PMC5572998.

Zeola MP, Guina J, Nahhas RW. Mental health referrals reduce recidivism in first-time juvenile offenders, but how do we determine who is referred?
Psychiatric Quarterly. 2017, 88(1):167-183.
DOI 10.1007/s11126-016-9445-z. PMID 27241528.

Kashou N, Dar I, Hasenstab K, Nahhas RW, Jadcherla S. Somatic stimulation causes frontoparietal cortical changes in neonates: a functional near-infrared spectroscopy study.
Neurophotonics. 2017, 4(1):011004.
DOI 10.1117/1.NPh.4.1.011004. PMID 27570791. PMCID PMC4981749.

Guina J, Nahhas RW, Kawalec K, Farnsworth S. Are gender differences in DSM-5 PTSD symptomatology explained by sexual trauma?
Journal of Interpersonal Violence. 2016, 1-28.
DOI 10.1177/0886260516677290. PMID 27827321.

Guina J, Nahhas RW, Goldberg AJ, Farnsworth S. PTSD symptom severities, interpersonal traumas and benzodiazepines are associated with substance-related problems in trauma patients.
Journal of Clinical Medicine. 2016, 5(8):70.
DOI 10.3390/jcm5080070. PMID 27517964. PMCID PMC4999790.

Lamy FR, Daniulaityte R, Sheth A, Nahhas RW, Martins SS, Boyer EW, Carlson RG. Those edibles hit hard: Exploration of Twitter data on cannabis edibles in the U.S.
Drug and Alcohol Dependence, 2016, 164:64-70.
DOI 10.1016/j.drugalcdep.2016.04.029. PMID 27185160. PMCID PMC4893972.

Kashou N, Giacherio B, Nahhas RW, Jadcherla S. Hand-grasping and finger tapping induced similar functional near-infrared spectroscopy cortical responses.
Neurophotonics, 2016, 3(2):025006.
DOI 10.1117/1.NPh.3.2.025006. PMID 27335888. PMCID PMC4909125.

Carlson RG, Nahhas RW, Martins SS, Daniulaityte R. Predictors of transition to heroin use among non-opioid dependent illicit pharmaceutical opioid users: a natural history study.
Drug and Alcohol Dependence, 2016, 160:127-134.
DOI 10.1016/j.drugalcdep.2015.12.026. PMID 26785634. PMCID PMC4767561.

Lehrer DS, Pato MT, Nahhas RW, Miller BJ, Malaspina D, Sobell JL, Buckley PF, Pato CN. Paternal age effect: Replication in schizophrenia with intriguing dissociation between bipolar with and without psychosis.
American Journal of Medical Genetics Part B: Neuropsychiatric Genetics, 2016, 171(4):495-505.
DOI 10.1002/ajmg.b.32334. PMID 26183902.

Daniulaityte R, Nahhas RW, Wijeratne S, Carlson RG, Lamy FR, Martins SS, Boyer EW, Smith GA, Sheth A. “Time for dabs”: Analyzing Twitter data on marijuana concentrates across the U.S.
Drug and Alcohol Dependence, 2015, 155:307-311.
DOI 10.1016/j.drugalcdep.2015.07.1199. PMID 26338481. PMCID PMC4581982.

Guina J, Rossetter SR, DeRhodes BJ, Nahhas RW, Welton RS. Benzodiazepines for PTSD: A systematic review and meta-analysis.
Journal of Psychiatric Practice, 2015, 21(4):281-303.
DOI 10.1097/PRA.0000000000000091. PMID 26164054.

Duren DL, Nahhas RW, Sherwood RJ. Do secular trends in skeletal maturity occur equally in both sexes?
Clinical Orthopaedics and Related Research, 2015, 473(8):2559-2567.
DOI 10.1007/s11999-015-4213-1. PMID 25716212. PMCID PMC4488188.

von Hippel PT, Nahhas RW, Czerwinski SA. How much do children’s body mass indices change over intervals of 6-12 months? Statistics from before and during the obesity epidemic.
Pediatric Obesity, 2015, 10(6):468-475.
DOI10.1111/ijpo.12008. PMID 25704952.

Nahhas RW, Valiathan M, Sherwood RJ. Variation in onset, duration, intensity, and direction of adolescent growth in the mandible, maxilla, and cranial base: The Fels Longitudinal Study.
The Anatomical Record, 2014, 297(7):1195–1207.
DOI 10.1002/ar.22918. PMID 24737730. PMCID PMC4103980.

Carlson RG, Nahhas RW, Daniulaityte R, Martins SS, Li L, Falck RS. Latent class analysis of non-opioid dependent illegal pharmaceutical opioid users in Ohio.
Drug and Alcohol Dependence, 2014, 134:259-266.
DOI 10.1016/j.drugalcdep.2013.10.004. PMID 24210772. PMCID PMC3865109.

Nahhas RW, Sherwood RJ, Chumlea WC, Duren DL. An update of the statistical methods underlying the FELS method of skeletal maturity assessment.
Annals of Human Biology, 2013, 40(6):505-514.
DOI 10.3109/03014460.2013.806591. PMID 23992229. PMCID PMC4013782.

von Hippel PT, Nahhas RW. Extending the history of child obesity in the United States: The Fels Longitudinal Study, birth years 1930 to 1993.
Obesity, 2013, 21(10):2153-2156.
DOI 10.1002/oby.20395. PMID 23512972. PMCID PMC3695078.

Nahhas RW, Sherwood RJ, Chumlea WC, Towne B, Duren DL. Predicting the timing of maturational spurts in skeletal age.
American Journal of Physical Anthropology, 2013, 150(1):68-75.
DOI 10.1002/ajpa.22142. PMID 23283666. PMCID PMC3988703.

Duren DL, Šešelj M, Froehle AW, Nahhas RW, Sherwood RJ. Skeletal growth and the changing genetic landscape during childhood and adulthood.
American Journal of Physical Anthropology, 2013, 150(1):48-57.
DOI 10.1002/ajpa.22183. PMID 23283664. PMCID PMC3539213.

Froehle AW, Nahhas RW, Sherwood RJ, Duren DL. Age-related changes in spatiotemporal characteristics of gait accompany ongoing lower limb linear growth in late childhood and early adolescence.
Gait and Posture, 2013, 38(1):14-19.
DOI 10.1016/j.gaitpost.2012.10.005. PMID 23159678. PMCID PMC3580126.

Linabery AM, Nahhas RW, Johnson W, Choh AC, Towne B, Odegaard AO, Czerwinski SA, Demerath EW. Stronger influence of maternal than paternal obesity on infant and early childhood body mass index: The Fels Longitudinal Study.
Pediatric Obesity, 2013, 8(3):159-169.
DOI 10.1111/j.2047-6310.2012.00100.x. PMID 23042783. PMCID PMC3765070.

Odegaard AO, Choh AC, Nahhas RW, Towne B, Czerwinski SA, Demerath EW. Systematic examination of infant size and growth metrics as risk factors for overweight in young adulthood.
PLOS ONE, 2013, 8(6):e66994.
DOI 10.1371/journal.pone.0066994. PMID 23818973. PMCID PMC3688577.

Šešelj M, Nahhas RW, Sherwood RJ, Chumlea WC, Towne B, Duren DL. The influence of age at menarche on cross-sectional geometry of bone in young adulthood. 
Bone, 2012, 51(1):38-45.
DOI 10.1016/j.bone.2012.03.030. PMID 22513271. PMCID PMC3584571.

Falck RS, Nahhas, RW, Li, L, Carlson RG. Surveying teens in school to assess the prevalence of problematic drug use.
Journal of School Health, 2012, 82(5):217-224.
DOI 10.1111/j.1746-1561.2012.00690.x. PMID 22494092.

Daniulaityte R, Falck RS, Li L, Nahhas RW, Carlson RG. Respondent-driven sampling to recruit young adult non-medical users of pharmaceutical opioids: problems and solutions.
Drug and Alcohol Dependence, 2012, 121(1-2):23-29.
DOI 10.1016/j.drugalcdep.2011.08.005. PMID 21885213. PMCID PMC3256264.

Williams KD, Nahhas RW, Cottom CR, Lawrence S, Subedi J, Jha B, Czerwinski SA, Blangero J, Williams-Blangero S, Towne B. Evaluation of qualitative methods for phenotyping brachymesophalangia – V from radiographs of children.
American Journal of Human Biology, 2012, 24(1):68-73.
DOI 10.1002/ajhb.22205. PMID 22131202. PMCID PMC3457917.

Choh AC, Curran JE, Odegaard AO, Nahhas RW, Czerwinski SA, Blangero J, Towne B, Demerath EW. Differences in the heritability of growth and growth velocity during infancy and associations with FTO variants.
Obesity, 2011, 19(9):1847-1854.
DOI 10.1038/oby.2011.175. PMID 21720422. PMCID PMC4013792.

Choh AC, Nahhas RW, Lee M, Choi YS, Chumlea WC, Duren DL, Sherwood RJ, Towne B, Siervogel RM, Demerath EW, Czerwinski SA. Secular trends in blood pressure during early to middle adulthood: The Fels Longitudinal Study.
Journal of Hypertension, 2011, 29(5):838-845.
DOI 10.1097/HJH.0b013e328344da30. PMID 21430562. PMCID PMC3988666.

Lee M, Nahhas RW, Choh AC, Demerath EW, Duren DL, Chumlea WC, Sherwood RJ, Towne B, Siervogel RM, Czerwinski SA. Longitudinal changes in calcaneal quantitative ultrasound measures during childhood.
Osteoporosis International, 2011, 22(8):2295-2305.
DOI 10.1007/s00198-010-1458-0. PMID 20976593. PMCID PMC3988661.

Sherwood, RJ, Duren DL, Mahaney MC, Blangero J, Dyer TD, Cole SA, Czerwinski SA, Chumlea WC, Siervogel RM, Choh AC, Nahhas RW, Lee M, Towne B. A genome-wide linkage scan for quantitative trait loci influencing the craniofacial complex in humans (Homo sapiens sapiens).
The Anatomical Record, 2011, 294(4):664-675.
DOI 10.1002/ar.21337. PMID 21328561. PMCID PMC3091483.

Nahhas RW. Sociolinguistic survey of Lawa in Thailand.
SIL Electronic Survey Reports 2011-044. SIL: Dallas, TX.
(link)

Nahhas RW, Choh AC, Lee M, Chumlea WC, Duren DL, Siervogel RM, Sherwood RJ, Towne B, Czerwinski SA. Bayesian longitudinal plateau model of adult grip strength.
American Journal of Human Biology, 2010, 22(5):648–656.
DOI 10.1002/ajhb.21057. PMID 20737612. PMCID PMC3988672.

Tehan TM, Nahhas RW. Mpi present and future: Reversing language shift.
Mon-Khmer Studies Journal, 2009, 38:87-104. (link)

Towne B, Williams KD, Blangero J, Czerwinski SA, Demerath EW, Nahhas RW, Dyer TD, Cole SA, Lee M, Choh AC, Duren DL, Sherwood RJ, Chumlea WC, Siervogel RM. Presentation, heritability, and genome-wide linkage analysis of the mid-childhood growth spurt in healthy children from the Fels Longitudinal Study.
Human Biology, 2008, 80(6):623-636.
DOI 10.3378/1534-6617-80.6.623. PMID 19728540. PMCID PMC2801436.

Nahhas RW. Sociolinguistic survey of Mpi in Thailand.
SIL Electronic Survey Reports 2007-016. SIL: Dallas, TX.
(link)

Nahhas RW, Wolfe DA, Chen H. Ranked set sampling: ranking error models and estimation of visual judgment error variance.
Biometrical Journal, 2004, 46(2):255-263.
DOI 10.1002/bimj.200210021.

Nahhas RW, Wolfe DA, Chen H. Ranked set sampling: cost and optimal set size.
Biometrics, 2002, 58(4):964-971.
DOI: 10.1111/j.0006-341X.2002.00964.x. PMID 12495151.

Lanphear BP, Kahn RS, Berger O, Auinger P, Bortnick SM, Nahhas RW. Contribution of residential exposures to asthma in US children and adolescents.
Pediatrics, 2001, 107(6):E98.
PMID 11389296.

Ilich-Ernst JZ, McKenna AA, Badenhop NE, Clairmont AC, Andon MB, Nahhas RW, Goel P, Matkovic V. Iron status, menarche, and calcium supplementation in adolescent girls.
American Journal of Clinical Nutrition, 1998, 68(4):880-887.
PMID 9771866. (link) [Erratum in: American Journal of Clinical Nutrition, 1999, 69(3):577a-577].

Matkovic V, Ilich JZ, Skugor M, Badenhop NE, Goel P, Clairmont A, Klisovic D, Nahhas RW, Landoll JD. Leptin is inversely related to age at menarche in human females.
Journal of Clinical Endocrinology and Metabolism, 1997, 82(10):3239-3245.
DOI 10.1210/jcem.82.10.4280. PMID 9329346.

• American Public Health Association
• American Statistical Association