Figure 2.

Risk ratio (95% CI) of death, invasive mechanical ventilation (IMV), and admission to intensive care unit (ICU), by the number of underlying medical conditions among adults hospitalized with COVID-19 in the Premier Healthcare Database Special COVID-19 Release. Each panel contains the results of a single generalized linear model with Poisson distribution and log link function, adjusted for age group, sex, race/ethnicity, payer type, hospital urbanicity, US Census region of hospital, admission month, and admission month squared as controls. Patients who died without ICU care or IMV were excluded from the sample when estimating the model with the outcome of ICU care or IMV, respectively.

Outcome	Risk Ratio (95% CI)
Death
No conditions	Reference
1 condition	1.53 (1.41–1.67)
2–5 conditions	2.55 (2.32–2.80)
6–10 conditions	3.29 (2.98–3.63)
>10 conditions	3.82 (3.45–4.23)
IMV
No conditions	Reference
1 condition	1.57 (1.45–1.70)
2-5 conditions	2.91 (2.68–3.15)
6-10 conditions	4.10 (3.75–4.49)
>10 conditions	4.47 (4.07–4.90)
ICU admission
No conditions	Reference
1 condition	1.32 (1.27–1.36)
2-5 conditions	1.60 (1.52–1.69)
6-10 conditions	1.84 (1.73–1.97)
>10 conditions	1.96 (1.82–2.11)