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Jill Landsbaugh Kaar

TitleAssociate Professor
InstitutionUniversity of Colorado Denver - Anschutz Medical Campus

    Collapse Biography 
    Collapse education and training
    University of Pittsburgh , Pittsburgh, PABS05/2002
    University of Pittsburgh , Pittsburgh, PAMS08/2003
    University of Pittsburgh , Pittsburgh, PAPhD05/2007
    Cambridge University , Cambridge, England Postdoctoral fellowship07/2010

    Collapse Overview 
    Collapse overview
    As a behavioral epidemiologist, I study how health behaviors (i.e., sleep, diet, and activity), impact the health (i.e., obesity, type 2 diabetes (T2D), early risk factors for cardiovascular disease) and well-being (i.e., indicators of mental health, depression, anxiety) of children and adolescents. I use observational methods via both quantitative and qualitative methodologies to first identify key associations with health behaviors and disease risk, and then use these findings to guide intervention strategies with potential for widespread dissemination and implementation. At this time, I am principal investigator for three active intervention protocols that use both clinical and school-based designs to change behaviors of children and adolescents. All active protocols have a sleep intervention component and are focused on improving mental and/or physical health of pediatric populations. I have worked in the field of pediatric weight management for almost fifteen years. First, as a dietician at a children’s hospital outpatient weight management clinic and on others’ research protocols and now I am the principal investigator for my own research studies targeting health outcomes (i.e., weight loss, prevention of T2D) and well-being (i.e., building resilience, coping skills, decreasing symptoms of depression and anxiety) in pediatric populations. My primary research focus is examining the mediating effect of sleep duration on the relationship between health behaviors, diet and activity, and overall health in children and adolescents.

    Current Research Projects

    Observational Studies

    Sleep, insulin sensitivity, and weight in adolescent’s post-bariatric surgery (PBS Study) is an observational study that is examining the relationships between sleep duration and timing, circadian rhythm, and sleep-disordered breathing in a sample of adolescent’s post-bariatric surgery. The goal of this study is to identify key associations with sleep health and long-term weight loss in hopes to next develop interventions to prevent weight re-gain in adolescents who have undergone bariatric surgery.

    Longitudinal changes in BMI trajectories among patients with acute lymphoblastic leukemia (ALL) by treatment modality (chemotherapy vs bone marrow transplant) is an observational study that is focused on identifying critical time points for a weight management intervention.
    Childhood cancer survivors often experience obesity, metabolic syndrome, and T2D over the course of their lives. Through this work, we hope to identify the best time to intervene in hopes to prevent these long-term endocrine-related disorders. The findings from this work will help us develop an appropriate intervention for ALL survivors.


    Building Resilience for Healthy Kids (Healthy Kids) is a school-based intervention that uses a 1:1 health coaching model to build resilience through improving children’s self-efficacy and coping skills. We have completed our Pilot Phase in May 2020 and will be starting Phase 2 this upcoming 2020-21 academic year. Phase 2 will pilot an “add-on” to Healthy Kids which will target kids who have insufficient sleep by providing them a sleep extension intervention, Enhance Rest & Refuel (Enhance R&R). The goal of Healthy Kids plus Enhance R&R is to prepare children with the tools needed to decrease their risk for symptoms of depression and anxiety and other mental health disorders when faced with adversity (i.e., COVID-19).

    Improving Insulin Resistance and Energy Metabolism through Sleep Extension in Adolescents (The REM Study) is a clinically based, sleep extension intervention. Adolescents with obesity and pre-diabetes receive a standard of care diet and activity weight loss intervention (SC) or SC plus a sleep extension intervention. The goal of this study is to examine changes in obesity-related insulin resistance (IR) metabolites that have potential to lead to improved IR in adolescent populations with pre-diabetes.

    Improving adherence to continuous positive airway pressure treatment in adolescent patients with obstructive sleep apnea (The REM+ Study) is an intervention designed to approve adherence to CPAP among children and adolescents. As compliance is a key factor in determining successful treatment outcomes, this intervention focuses on improving the communication from the provider to the patient in hopes to improve the number of hours patients will wear their CPAP.

    Collapse Research 
    Collapse research activities and funding
         (Jill Landsbaugh Kaar)Jan 1, 2019 - Dec 31, 2020
    Children’s Hospital Colorado Research Institute Pilot Award
    Improving Insulin Resistance and Energy Metabolism through Sleep Extension in Adolescents: The REM study
    Role: PI

         (Jill Kaar)May 1, 2019 - Jun 30, 2022
    Children's Hospital Colorado, Colorado Springs Foundation
    Building Resilience for Healthy Kids
    Role: PI

         (Kaar JL & Simon SL)Jul 1, 2019 - Jun 30, 2021
    Children’s Hospital Colorado Bariatric Surgery Center Pilot Award
    Sleep, Insulin Sensitivity, and Weight in Adolescents Post-Bariatric Surgery: Sleep-PBS Study
    Role: MPI

    Collapse Bibliographic 
    Collapse selected publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
    List All   |   Timeline
    1. Kaar JL, Schmiege SJ, Drews K, Higgins J, Walders-Abramson N, Isganaitis E, Willi SM, Marcus MD, Zeitler PS, Kelsey MM. Evaluation of the longitudinal change in health behavior profiles across treatment groups in the TODAY clinical trial. Pediatr Diabetes. 2020 03; 21(2):224-232. PMID: 31886931.
      View in: PubMed
    2. Davis SM, Kaar JL, Ringham BM, Hockett CW, Glueck DH, Dabelea D. Sex differences in infant body composition emerge in the first 5 months of life. J Pediatr Endocrinol Metab. 2019 Nov 26; 32(11):1235-1239. PMID: 31483758.
      View in: PubMed
    3. Kaar JL, Schmiege SJ, Kalkwarf HJ, Woo JG, Daniels SR, Simon SL. Longitudinal Assessment of Sleep Trajectories during Early Childhood and Their Association with Obesity. Child Obes. 2020 Apr; 16(3):211-217. PMID: 31750742.
      View in: PubMed
    4. Simon SL, McWhirter L, Diniz Behn C, Bubar KM, Kaar JL, Pyle L, Rahat H, Garcia-Reyes Y, Carreau AM, Wright KP, Nadeau KJ, Cree-Green M. Morning Circadian Misalignment Is Associated With Insulin Resistance in Girls With Obesity and Polycystic Ovarian Syndrome. J Clin Endocrinol Metab. 2019 08 01; 104(8):3525-3534. PMID: 30888398.
      View in: PubMed
    5. Tovar A, Kaar JL, McCurdy K, Field AE, Dabelea D, Vadiveloo M. Maternal vegetable intake during and after pregnancy. BMC Pregnancy Childbirth. 2019 Jul 26; 19(1):267. PMID: 31349808.
      View in: PubMed
    6. Simon SL, Diniz Behn C, Laikin A, Kaar JL, Rahat H, Cree-Green M, Wright KP, Nadeau KJ. Sleep & Circadian Health are Associated with Mood & Behavior in Adolescents with Overweight/Obesity. Behav Sleep Med. 2020 Jul-Aug; 18(4):550-559. PMID: 31218887.
      View in: PubMed
    7. Kaar JL, Sauder KA, Shapiro AL, Starling AP, Ringham BM, Johnson SL, Dabelea D. Infant Feeding Practices In a Diverse Group of Women: The Healthy Start Study. Clin Med Insights Pediatr. 2019; 13:1179556518824362. PMID: 30718970.
      View in: PubMed
    8. McCurdy K, Tovar A, Kaar JL, Vadiveloo M. Pathways between maternal depression, the family environment, and child BMI z scores. Appetite. 2019 03 01; 134:148-154. PMID: 30599152.
      View in: PubMed
    9. Simon SL, Behn CD, Cree-Green M, Kaar JL, Pyle L, Hawkins SMM, Rahat H, Garcia-Reyes Y, Wright KP, Nadeau KJ. Too Late and Not Enough: School Year Sleep Duration, Timing, and Circadian Misalignment Are Associated with Reduced Insulin Sensitivity in Adolescents with Overweight/Obesity. J Pediatr. 2019 02; 205:257-264.e1. PMID: 30497764.
      View in: PubMed
    10. Andersen LM, Boles RE, Kaar JL, Gance-Cleveland B, Gauthier KI, Cason-Wilkerson R, Federspiel D, Valenzuela M, Thompson DA. Use of the Delphi Technique to Obtain Community Input on Leading Contributors to Early Childhood Obesity in Latino Communities. Hisp Health Care Int. 2018 09; 16(3):113-119. PMID: 30207164.
      View in: PubMed
    11. Kaar JL, Schmiege SJ, Vadiveloo M, Simon SL, Tovar A. Sleep duration mediates the relationship between health behavior patterns and obesity. Sleep Health. 2018 10; 4(5):442-447. PMID: 30241659.
      View in: PubMed
    12. Tigges BB, Kaar JL, Erbstein N, Silberman P, Winseck K, Lopez-Class M, Burbacher TM. Effectiveness of community outreach and engagement in recruitment success for a prebirth cohort. J Clin Transl Sci. 2017 Jun; 1(3):184-191. PMID: 29082032.
      View in: PubMed
    13. Kaar JL, Simon SL, Schmiege SJ, Nadeau KJ, Kelsey MM. Adolescent's Health Behaviors and Risk for Insulin Resistance: A Review of the Literature. Curr Diab Rep. 2017 07; 17(7):49. PMID: 28526994.
      View in: PubMed
    14. Kaar JL, Luberto CM, Campbell KA, Huffman JC. Sleep, health behaviors, and behavioral interventions: Reducing the risk of cardiovascular disease in adults. World J Cardiol. 2017 May 26; 9(5):396-406. PMID: 28603586.
      View in: PubMed
    15. Starling AP, Sauder KA, Kaar JL, Shapiro AL, Siega-Riz AM, Dabelea D. Maternal Dietary Patterns during Pregnancy Are Associated with Newborn Body Composition. J Nutr. 2017 07; 147(7):1334-1339. PMID: 28539412.
      View in: PubMed
    16. Sauder KA, Kaar JL, Starling AP, Ringham BM, Glueck DH, Dabelea D. Predictors of Infant Body Composition at 5 Months of Age: The Healthy Start Study. J Pediatr. 2017 04; 183:94-99.e1. PMID: 28161200.
      View in: PubMed
    17. Vos MB, Kaar JL, Welsh JA, Van Horn LV, Feig DI, Anderson CAM, Patel MJ, Cruz Munos J, Krebs NF, Xanthakos SA, Johnson RK. Added Sugars and Cardiovascular Disease Risk in Children: A Scientific Statement From the American Heart Association. Circulation. 2017 May 09; 135(19):e1017-e1034. PMID: 27550974.
      View in: PubMed
    18. Crume TL, Brinton JT, Shapiro A, Kaar J, Glueck DH, Siega-Riz AM, Dabelea D. Maternal dietary intake during pregnancy and offspring body composition: The Healthy Start Study. Am J Obstet Gynecol. 2016 Nov; 215(5):609.e1-609.e8. PMID: 27371352.
      View in: PubMed
    19. Hudak ML, Park CH, Annett RD, Hale DE, McGovern PM, McLaughlin TJ, Dole N, Kaar JL, Balsam MJ. The National Children's Study: An Introduction and Historical Overview. Pediatrics. 2016 Jun; 137 Suppl 4:S213-8. PMID: 27251867.
      View in: PubMed
    20. Kaar JL, Markovic N, Amsden LB, Gilliland J, Shorter CF, Peters B, Nachreiner NM, Garel M, Nicholas W, Skarpness B, Drews-Botsch C, Hogue CJ, Dabelea D. The Experience of Direct Outreach Recruitment in the National Children's Study. Pediatrics. 2016 06; 137 Suppl 4:S258-64. PMID: 27251872.
      View in: PubMed
    21. Li C, Beech B, Crume T, D'Agostino RB, Dabelea D, Kaar JL, Liese AD, Mayer-Davis EJ, Pate R, Pettitt DJ, Taplin C, Rodriguez B, Merchant AT. Longitudinal association between television watching and computer use and risk markers in diabetes in the SEARCH for Diabetes in Youth Study. Pediatr Diabetes. 2015 Aug; 16(5):382-91. PMID: 25041407.
      View in: PubMed
    22. Kaar JL, Crume T, Brinton JT, Bischoff KJ, McDuffie R, Dabelea D. Maternal obesity, gestational weight gain, and offspring adiposity: the exploring perinatal outcomes among children study. J Pediatr. 2014 Sep; 165(3):509-15. PMID: 24996985.
      View in: PubMed
    23. Kaar JL, Brinton JT, Crume T, Hamman RF, Glueck DH, Dabelea D. Leptin levels at birth and infant growth: the EPOCH study. J Dev Orig Health Dis. 2014 Jun; 5(3):214-8. PMID: 24901661.
      View in: PubMed
    24. Lynch KE, Landsbaugh JR, Whitcomb BW, Pekow P, Markenson G, Chasan-Taber L. Physical activity of pregnant Hispanic women. Am J Prev Med. 2012 Oct; 43(4):434-9. PMID: 22992363.
      View in: PubMed
    25. Lakshman R, Landsbaugh JR, Schiff A, Cohn S, Griffin S, Ong KK. Developing a programme for healthy growth and nutrition during infancy: understanding user perspectives. Child Care Health Dev. 2012 Sep; 38(5):675-82. PMID: 21752063.
      View in: PubMed
    26. Lakshman RR, Landsbaugh JR, Schiff A, Hardeman W, Ong KK, Griffin SJ. Development of a questionnaire to assess maternal attitudes towards infant growth and milk feeding practices. Int J Behav Nutr Phys Act. 2011 Apr 21; 8:35. PMID: 21510900.
      View in: PubMed
    27. Steele RM, van Sluijs EM, Sharp SJ, Landsbaugh JR, Ekelund U, Griffin SJ. An investigation of patterns of children's sedentary and vigorous physical activity throughout the week. Int J Behav Nutr Phys Act. 2010 Dec 09; 7:88. PMID: 21143901.
      View in: PubMed
    28. Wijndaele K, Lakshman R, Landsbaugh JR, Ong KK, Ogilvie D. Determinants of early weaning and use of unmodified cow's milk in infants: a systematic review. J Am Diet Assoc. 2009 Dec; 109(12):2017-28. PMID: 19942019.
      View in: PubMed
    29. Rofey D, Reede VK, Landsbaugh J, Corcoran KJ. Perceptions and metaperceptions of same-sex social interactions in college women with disordered eating patterns. Body Image. 2007 Mar; 4(1):61-8. PMID: 18089252.
      View in: PubMed
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