Fig. 3

Annual change in medical cost according to age subgroups. A Annual changes in adjusted gross medical costs between 2010 and 2017 according to age subgroups. Adults (20 ≤ age ≤ 64): + $23.0 million /year [95% CI − $15.8 to + $30.3 million], p < 0.0001. Early elderly (65 ≤ age ≤ 74): + $55.3 million/year [95% CI + $40.9 to + $69.8 million], p < 0.0001. Late elderly (75 ≤ age): + $123.2 million/year [95% CI + $76.8 to + $170.0 million], p < 0.0001. B Annual changes in adjusted medical costs per hospitalization between 2010 and 2017 according to age subgroups. Adults (20 ≤ age ≤ 64): − $81/year [95% CI − $91 to − $70], p < 0.0001. Early elderly (65 ≤ age ≤ 74): − $77/year [95% CI − $87 to − $67], p < 0.0001. Late elderly (75 ≤ age): − $81/year [95% CI − $86 to − $75], p < 0.0001. The error bars indicate the 95% confidence interval. The coefficient was calculated using a linear regression analysis