Bariatric treatments for adult obesity - Institute of Health Economics

APPENDIX E.BTable E.B.1 Estimate of economic burden of obesityS1Outlined regression resultsVariableOutpatient andphysician costPhysiciancostPhysicianvisitOutpatientcostOutpatientvisitsInpatientvisitsBMI 22.716*** 17.263*** 0.320*** 12.022*** 0.084*** 0.021***Age 11.682*** 10.732*** 0.192*** 10.297*** 0.026*** 0.012***Female 115.699*** 89.703*** 1.634*** 20.4 0.069 -0.005Income -24.317 -29.264* -0.373 -43.731** -0.266** -0.026High school & over -26.581 -22.935 -0.577 29.222 0.113 -0.006Ever smoked 40.332 17.909 -0.023 25.196 0.188 0.029Has physical activity -25.649 -38.907 -0.634* -72.139* -0.228 -0.001Has COPD 164.875* 236.529*** 2.820*** 173.009** 0.262 -0.134Has back problem 54.586* 56.304** 1.560*** 16.189 0.198 0.028Has high blood pressure -34.628 -17.222 -0.205 14.867 0.001 -0.039Has diabetes 71.861 83.380** 1.381** -66.891 -0.289 -0.001N 3660 3660 3660 1660 1667 311Adj R-squared 0.41 0.34 0.46 0.39 0.29 0.75Legend: * p < .05; ** p < .01; *** p < .001Note: Graph investigation and linear test showed costs/visits are linear in body mass index. So the impact of BMI on costs/visits wasassessed using linear regression, adjusted by age, gender, etc.S2Mean costs/visits per patientOutpatient and Physician Physician Outpatient Outpatient InpatientBMIphysician costs costs visit costs visits visitsUnderweight $ 872.07 $604.04 12.120 $701.26 2.571 1.163Normal weight $ 856.38 $565.05 11.764 $643.82 2.620 1.239Overweight $ 969.94 $664.62 13.602 $712.31 3.054 1.357Obese $1150.34 $813.22 16.315 $803.15 3.694 1.442Note: Mean costs/visits were predicted using results from the regression models above.S3# of residents/patients by BMIPCD andBMI # population CCHS ACCS PCD ACCS DADUnderweight 57,796 175 105 105 48 10Normal weight 1,116,229 3586 2008 2004 836 150Overweight 842,883 2994 1682 1680 796 145Obese 463,222 1883 1140 1140 576 106Note: Second column is Alberta residents, represented by the sample in the CCHS survey; third column is residents completing theCCHS survey (i.e., the sample); remaining columns are patients in the databases.CCHS = Canadian community health survey; PCD = physician claim database; ACCS = Ambulatory Care Classification System;DAD = discharge abstract databaseBariatric treatments for adult obesity 199