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. 2022 Aug 12;12:13704. doi: 10.1038/s41598-022-17941-2

Table 2.

Number of hospitalizations and corresponding rates (per 1000) among individuals aged 65 years or more with at least a chronic disease from ATS Brianza and ATS Bergamo combined, overall and by hospital regimen, type of hospitalization and level of complexity, in 2017–2019 and 2020, and rate ratio for 2020 versus 2017–2019, Lombardy, Italy.

Average
2017–2019
2020 Rate ratio (95% CI)
N Rate N Rate
Overall 84,624 225.8 78,345 193.3 0.86 (0.85–0.86)
Hospital regimena
Ordinary 72,565 193.6 68,149 168.1 0.87 (0.86–0.88)
Day-hospital 10,849 28.9 8357 20.6 0.71 (0.69–0.73)
Type of diagnosis-related group
Medical 43,702 116.6 46,641 115.1 0.99 (0.97–1.00)
Surgical 40,912 109.1 31,704 78.2 0.72 (0.71–0.73)
Level of complexity
Low 24,662 65.8 27,552 68.0 1.03 (1.02–1.05)
Medium 47,045 125.5 42,108 103.9 0.83 (0.82–0.84)
High 12,916 34.5 8685 21.4 0.62 (0.60–0.64)

95% CI 95% confidence interval.

aThis category does not include sub-acute hospitalizations, included in overall hospitalizations.