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Table 1 Model parameters

From: Impact of weight trajectory after bariatric surgery on co-morbidity evolution and burden

ParameterReferenceBase caseNotes
AgePadwal et al. 2014 [10]43.5 ± 9.5 yearsUse population demographics of a Canadian surgical cohort (150 patients, Alberta)
BMI46.2 ± 7.4 kg/m2
Female87.3% ± 2.7%
T2D baseline44.7% ± 4.1%
HTN baseline61.3% ± 4.0%
DLP baseline60.0% ± 4.0%
Cohort sizeN/A100 patientsExample cohort
Provincial RYGB surgical volumeCIHI report [4]Ontario 2380Most recent data available for the provinces with top 3 RYGB volumes in year ending 2014
Quebec 310
Alberta 260
Discount rateCADTH guidelines [15]1.5%4th edition guidelines
Cost T2D, year 1Rosella et al. 2016 [16]Male: $4061 ± $609Ontario
Base value uncertainty taken as ±15%
Female: $4017 ± $603
Cost T2D, year 2+Rosella et al. 2016 [16]Male: $828 ± $123Ontario
Base value average costs years 2–8 in study
Female: $1023 ± $124
Cost HTNWeaver et al. 2015 [17]$2163 ± $227Canada wide
Cost DLPConly et al. 2011 [18]$79 ± $8Alberta
Final value includes only laboratory costs for patients on statins minus costs for patient time and travel
  1. Costs from reported currency year were inflated to 2018 Canadian dollars using Statistics Canada consumer price index data for health services and products. CADTH, Canadian Agency for Drugs and Technologies in Health; CIHI, Canadian Institute for Health Information; DLP, dyslipidaemia; HTN, hypertension; NA, not applicable; RYGB, Roux-en-Y gastric bypass; T2D, type 2 diabetes mellitus