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Table 3 Health outcomes and direct health care costs of patients during 6-month pre-and post-bariatric surgery. Mean values of each period. Sao Paulo (Brazil), 2018

From: Impacts of bariatric surgery in health outcomes and health care costs in Brazil: Interrupted time series analysis of multi-panel data

Health outcomes Pre-surgery μ (±SD) Post-surgery μ (±SD) P Cost per unit change (US$)
Weight (kg) 125.53 (±18.58) 103.23 (±24.46) <0.001 61.68
BMI (kg/m [2]) 47.36 (±4.22) 39.01 (±7.26) <0.001 164.71
Blood pressure (mmHg) 132 (±15.21) 126.51 (±17.36) 0.0025 250.52
Cholesterol (mg/dL) 165.11 (±39.9) 167.78 (±38.55) 0.8341 515.12
VLDL (mg/dL) 21.51 (±8.33) 22.91 (±8.93) <0.001 982.41
LDL (mg/dL) 94.06 (±34.66) 93.2 (±34.58) 0.0147 1,599.27
HDL (mg/dL) 45.63 (±14.38) 51.88 (±13.23) <0.001 220.06
Triglycerides (mg/dL) 130.67 (±64.21) 117.27 (±56.95) <0.001 102.64
Insulin (IU/mL) 17.19 (±22.55) 12.69 (±7.47) <0.001 305.64
Glucose-linked hemoglobin (%) 127.57 (±43.88) 113.61 (±36.47) 0.001 98.52
Fasting glucose (mg/dL) 113.22 (±45.77) 99.11 (±39.83) <0.001 97.47
Health care costs Pre-surgery μ (±SD) Post-surgery μ (±SD) P Cost per unit change (US$)
Consultations 17.64 (±13.9) 18.06 (±15.32) <0.001 3,274.69
Inpatient days* 11,913.26 (±12,682.01) 9,151.04 (±9,695.16) <0.001 0.50
Laboratory exams 108.72 (±112.94) 177.68 (±217.78) <0.001 19.94
Image exams 888.99 (±901.22) 881.46 (±854.78) 0.0161 182.65
Medication 683.9 (±854.73) 508.45 (±696.99) <0.001 7.84
Total direct costs 996.61 (±4,515.39) 2,371.98 (±6,172.79) <0.001 -
  1. Obs.: μ mean, SD standard deviation. *Including the cost of bariatric surgery