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. 2022 May 2;5(5):e229661. doi: 10.1001/jamanetworkopen.2022.9661

Figure 1. Interrupted Time Series Plots Comparing Patients Undergoing Sleeve Gastrectomy (SG) vs Roux-en-Y Gastric Bypass (RYGB) Between 2008 and 2016 Across Ambulatory Care Cost Categories.

Figure 1.

Adjusted time series plots of per member per quarter outpatient costs before and after surgery. Costs per claim were measured in 2017 US dollars. Costs were winsorized at the 99th percentile at the quarterly level in the prescription, office visit, laboratory, and radiology categories to reduce the effect of high outliers. Gray boxes represent unanalyzed baseline period through index surgery but are shown so that the high-cost presurgical and perioperative periods can be represented relative to true baseline and follow-up. A, Baseline (year −2 prior to surgery), mean (SD) total ambulatory costs were $7117 ($9655) per person per year for SG and $8471 ($10 919) per person per year for RYGB. B, Baseline (year −2 prior to surgery), mean (SD) prescription costs were $2606 ($4739) per person per year for SG and $3581 ($5488) per person per year for RYGB. C, Baseline (year −2 prior to surgery), mean (SD) office visit costs were $780 ($808) per person per year for SG and $854 ($857) per person per year for RYGB. D, Baseline (year −2 prior to surgery), mean (SD) laboratory costs were $396 ($641) per person per year for SG and $374 ($608) per person per year for RYGB. E, Baseline (year −2 prior to surgery), mean (SD) radiology costs were $643 ($1202) per person per year for SG and $706 ($1289) per person per year for RYGB. F, Baseline (year −2 prior to surgery), mean (SD) all other outpatient costs were $2673 ($6273) per person per year for SG and $2956 ($6672) per person per year for RYGB.