Table 2 Hazard ratios (HRs) of mortality at one-year follow-up according to quintiles of body mass index (BMI)

Number of deaths

405

256

197

136

85

Person-years

1,453

1,552

1,577

1,604

1,640

Mortality rate (/1000 person-years)

278.7

164.9

124.9

84.8

51.8

Unadjusted HR

(95 % CI)

5.4

(4.3–6.8)

3.2

(2.5–4.1)

2.4

(1.9–3.1)

1.6

(1.3–2.2)

1 (Ref.)

<0.0001

Adjusted HR^a

(95 % CI)

4.9

(3.9–6.2)

2.9

(2.2–3.7)

2.1

(1.6–2.7)

1.5

(1.1–2.0)

1 (Ref.)

<0.0001

Adjusted HR^b

(95 % CI)

2.4

(1.9–3.1)

1.8

(1.3–2.3)

1.5

(1.1–1.9)

1.2

(0.9–1.6)

1 (Ref.)

<0.0001

Adjusted HR^c

(95 % CI)

2.4

(1.9–3.1)

1.7

(1.3–2.3)

1.5

(1.2–2.0)

1.2

(0.9–1.6)

1 (Ref.)

<0.0001