Of the 153,892 adult patients registered with an index hospitalization for asthma exacerbation, 14.2% were noted to have 30-day any-cause readmission. Compared with those without readmissions, these patients were relatively older (mean age: 64.5 vs 60.6 years; P > .001), largely funded via public insurance (Medicare: 65% vs 53% [P < .001]; Medicaid: 17% vs 16% [P = .002]), had a higher number of comorbidities (mean, 7.0 vs 4.4; P < .001), and longer length of stay (mean, 6.6 vs 5.0 days; P < .001) (Table 1). A multivariable regression model fitted with a generalized estimating equation to limit clustering of similar outcomes within hospitals showed that elderly (OR, 1.30 [95% CI, 1.22-1.40]; P < .001) and middle-aged (OR, 1.45 [95% CI, 1.36-1.54]; P < .001) patients had a higher likelihood of readmission than younger age groups; these findings were similar to those reported by Hasegawa et al, albeit with lower point estimates (Fig 1A). Sensitivity analysis with a model-based multiple imputation approach for missing values for several covariates yielded similar results. However, unlike their study, we found no differences in daily percentages of readmissions between the three defined age groups. The highest rate of readmissions for all adults was between 2 and 3 days’ postdischarge (Fig 1B). Overall, our findings were consistent for the most part with those reported by Hasegawa et al.