Table 3 Direct effect of multimorbidity on the odds of hospitalization and related outcomes within 1 year among adults, aged 18 years and older with at least one priority chronic condition, by burden of multimorbidity, April 1, 2009 – March 31, 2010

Any hospitalization, OR (95 % CI)

Ref

1.6 (1.5–1.6)

2.5 (2.5–2.5)

3.9 (3.8–3.9)

7.6 (7.5–7.6)

Three or more hospitalizations among those hospitalized, OR (95 % CI)

Ref

1.6 (1.5–1.6)

2.1 (2.1–2.2)

2.7 (2.7–2.8)

4.3 (4.2–4.4)

Any days with non-medical discharge delay among those hospitalized, OR (95 % CI)

Ref

2.0 (2.0–2.1)

3.2 (3.1–3.3)

4.2 (4.1–4.4)

6.0 (5.9–6.2)

30-day readmission among those discharged alive, OR (95 % CI)

Ref

1.4 (1.4–1.4)

1.7 (1.7–1.8)

2.1 (2.0–2.2)

3.1 (3.1–3.2)