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Table 1 Model parameters

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

Parameter

Reference

Base case

Notes

Age

Padwal et al. 2014 [10]

43.5 ± 9.5 years

Use population demographics of a Canadian surgical cohort (150 patients, Alberta)

BMI

46.2 ± 7.4 kg/m2

Female

87.3% ± 2.7%

T2D baseline

44.7% ± 4.1%

HTN baseline

61.3% ± 4.0%

DLP baseline

60.0% ± 4.0%

Cohort size

N/A

100 patients

Example cohort

Provincial RYGB surgical volume

CIHI report [4]

Ontario 2380

Most recent data available for the provinces with top 3 RYGB volumes in year ending 2014

Quebec 310

Alberta 260

Discount rate

CADTH guidelines [15]

1.5%

4th edition guidelines

Cost T2D, year 1

Rosella et al. 2016 [16]

Male: $4061 ± $609

Ontario

Base value uncertainty taken as ±15%

Female: $4017 ± $603

Cost T2D, year 2+

Rosella et al. 2016 [16]

Male: $828 ± $123

Ontario

Base value average costs years 2–8 in study

Female: $1023 ± $124

Cost HTN

Weaver et al. 2015 [17]

$2163 ± $227

Canada wide

Cost DLP

Conly et al. 2011 [18]

$79 ± $8

Alberta

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