Truls' research interests include: chronic disease epidemiology; obesity; health services research; population health; public health; social medicine; medical informatics; health information systems; health surveys; program evaluation; cost-of-illness; clinical trials; primary care reform; international collaboration; electronic distance education; pharmacoepidemiology; aging; nutrition; dementia; diabetes; and stroke.
Koh H, Ee TX, Malhotra R, Allen JC, Tan TC, Ostbye T. Predictors and adverse outcomes of inadequate or excessive gestational weight gain in an Asian population. The Journal of Obstetrics and Gynaecology Research 2013 39(5). DOI: 10.1111/j.1447-0756.2012.02067.
Shin JH, Worni M, Castleberry AW, Pietrobon R, Omotosho PA, Silberberg M, Ostbye T. The application of comorbidity indices to predict early Postoperative outcomes after laparoscopic Roux-en-y gastric bypass: a nationwide comparative analysis of over 70,000 cases. Obesity Surgery 2013; 23(5): 638-649. doi: 10.1007/s11695-012-0853-3
Helmes E, Norton M, Ostbye T. Personality change in older adults with dementia: occurrence and association with severity of cognitive impairment. Advances in Aging Research 2013; 2(1):27-36. doi:10.4236/aar.2013.21004
Worni M, Ostbye T, Shah A, Carvalho E, Schudel IM, Shin JH, Pietrobon R, Gueller U. High risk for adverse outcomes after gastric bypass surgery following failed gastric banding: a population-based trend analysis of the United States. Annals of Surgery 2013;257(2):279-86. doi: 10.1097/SLA.0b013e3182683037.
Wiltheiss GA, Lovelady CA, West DG, Brouwer RJ, Krause KM, Ostbye T. Diet Quality and Weight Change among Overweight and Obese Postpartum Women Enrolled in a Behavioral Intervention Program. Journal of the Academy of Nutrition and Dietetics 2013; 113(1): 54-62. doi: 10.1016/j.jand.2012.08.012.
Ostbye T, Chan A, Malhotra R. Variation in and correlates of body mass status of older Singaporean men and women: Results from a national survey. Asia-Pacific Journal of Public Health 2013; 25(1): 42-56. doi: 10.1177/1010539510393726
Malhotra R, Malhotra C, Chan C, Ostbye T. socioeconomic status and obesity among older Singaporean Chinese men and women. Journal of Gerontology: B Psychological Sciences and Social Sciences 2013: 68(1): 117-127. doi: 10.1093/geronb/gbs102
Malhotra R, Chan A, Malhotra C, Ostbye T. Validity and reliability of the Caregiver Reaction Assessment scale among primary informal caregivers for older persons in Singapore. Aging and Mental Health 2012: 16(8):1004-1015.
Lombardo S, de Silva PV, Lipscomb H, Ostbye T. Musculoskeletal symptoms among female garment factory workers in Sri Lanka. International Journal of Occupational and Environmental Health 2012; 18(3): 210-219.
Fuemmeler BF, Yang C, Costanzo P, Hoyle RH, Siegler IC, Williams RB, Ostbye T. Parenting styles and body mass index trajectories from adolescence to adulthood. Health Psychology 2012; 31(4): 441-9. doi: 10.1037/a0027927
Ostbye T, Krause KM, Stroo M, Lovelady CA, Evenson KR, Peterson BL, Bastian LA, Swamy GK, West DG, Brouwer JN, Zucker NL. Parent-focused change to prevent obesity in preschoolers: Results from the KAN-DO study. Preventive Medicine 2012; 55(3): 188-195. DOI 10.1016/j.ypmed.2012.06.005
Worni M, Scudel I, Ostbye T, Shah A, Khare A , Pietrobon R, Thacker JK, Ulrich G. Worse outcomes in patients undergoing urgent surgery for left-sided diverticulitis admitted on weekends vs weekdays: a population-based study of 31832 patients. Archives of Surgery 2012; 147(7): 649-55
Ogundipe O, Hoyo C, Ostbye T, Oneko O, Manongi R, Lie RT, Daltveit T. Factors associated with prenatal folic acid and iron supplementation among 21,889 pregnant women in Northern Tanzania: A cross-sectional hospital-based study. BMC Public Health 2012; 12(1): 481.
Goswami ND, Gadkowski LB, Piedrahita C, Bissett D, Ahearn MA, Blain MLM, Ostbye T, Saukkonen J, Stout JE. Predictors of latent tuberculosis treatment initiation and completion at a U.S. public health clinic: a prospective cohort study. BMC Public Health 2012, 12:468
Malhotra C, Malhotra R, Ostbye T, Matchar D, Chan A. Depressive symptoms among informal caregivers of older adults: Insights from the Singapore Survey on Informal Caregiving. International Psychogeriatrics 2012; 24: 1335-1346.
Worni M, Ostbye T, Gandhi M, Rajgor D, Shah D, Shah A, Pietrobon R, Jacobs DO, Guller U. Laparoscopic appendectomy outcomes on the weekend and during the week are no different - a national study of 151.774 patients. World Journal of Surgery 2012; 36(7): 1527-1533.
Shin JH, Brouwer R, Maselko J, Young D, Ostbye T. Predictors of and health services utilization related to depressive symptoms among elderly Koreans. Social Science & Medicine 2012: 75(1): 170-85.
Malhotra C, Chan A, Malhotra R, Ostbye T. Prevalence, correlates and perceived causes of limitations in activities of daily living among older Singaporeans. Aging Clinical and Experimental Research 2012; 24 (1): 56-61.
Reller ME, Bodinayake C, Nagahawatte A, Devasiri V, Kodikara-Arachichi W, Strouse JJ, Flom JE, Ostbye T, Woods CW, Dumler JS. Unsuspected rickettsioses among patients with acute febrile illness, Sri Lanka, 2007. Emerging Infectious Diseases 2012; 18(5): 825-9. doi: 10.3201/eid1805.111563
Gulbrandsen P, Ostbye T, Lyna P, Dolor RJ, Tulsky JA, Alexander SC, Pollak KI. The influence of physician communication style on overweight patients' perception of length of encounter and physician being rushed. Family Medicine 2012; 44: 183-188.
Pollak K, Coffman C, Alexander S, Tulsky J, Lyna P, Dolor R, Cox M, Brouwer R, Bodner M, Ostbye T. Can physicians accurately predict which patients will lose weight, improve nutrition, and increase physical activity? Family Practice 2012: 29(5); 553-560.
Ostbye T, Peterson B, Katrina K, Swamy G. Lovelady C. Predictors of postpartum weight change among overweight and obese women: results from the Active Mothers Postpartum (AMP) study. Journal of Women's Health 2012: 21(2): 215-222.
Worni M, Guller U, Shah A, Gandhi M, Shah J, Rajgor D, Pietrobon R, Jacobs DO, Ostbye T. Cholecystectomy concomitant with laparoscopic gastric bypass: a trend analysis of the Nationwide Inpatient Sample from 2001 to 2008. Obesity Surgery 2012: 22 (2): 220-229.
Hurlen P, Borthne AS, Dahl FA, Ostbye T, Gulbrandsen P. Does PACS improve diagnostic accuracy in chest radiograph interpretations in clinical practice? European Journal of Radiology 2012; 81(1): 173-7.
Reller M, Bodinayake C, Nagahawatte A, Devasiri V, Kodikara-Arachichi W, Strouse JJ, Broadwater A, Ostbye T, De Silva A, Woods C. Unsuspected Dengue Causes Acute Febrile Illness in Young Adults in Rural and Semi-Urban Southern Sri Lanka. .Emerging Infectious Diseases. 2012; 18(2) [. http://dx.doi.org/10.3201/eid1802.110962