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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: Lancet Diabetes Endocrinol. 2015 Sep 17;3(11):855–865. doi: 10.1016/S2213-8587(15)00290-9

Figure 1. Aggregated 15-year healthcare costs.

Figure 1

Mean differences adjusted for baseline age, sex, smoking, body mass index, inclusion period (</≥ 1995), drug costs and hospital costs the year prior to the index date. Hospital days and costs were retrieved from the National Patient Register between 1987 and 2013, and data were not imputed (apart from missing cost data which were calculated from the observed number of hospital days). Outpatient care data were retrieved from the National Patient Register between 2001 and 2013 for observation years 2 to 15, with multiple imputation used for missing data. Drug cost data were retrieved from the Prescribed Drug Register between 2005 and 2013, and from self-reported drug use in SOS (years 1, 2, 3, 4, 6, 8, 10, 15), with multiple imputation used for missing data. *Total (sensitivity): Sensitivity analysis where the length of stay for the index bariatric surgery reflected practice in Sweden in 2012. Costs are reported in 2013 US$.