Table 4 Multivariable-adjusted* hazard ratios (HRs) and 95% confidence intervals (CIs) of all-cause mortality among 35 927 Chinese adults aged 80 years or older

Simplified Healthy Eating-index

 Quartile 1 (0–8)

1 (reference)

1 (reference)

1 (reference)

 Quartile 2 (9–10)

0.87

0.83–0.92

0.92

0.89–0.96

0.88–0.93

 Quartile 3 (11–12)

0.85

0.80–0.89

0.92

0.88–0.96

0.86–0.92

 Quartile 4 (13–18)

0.75

0.70–0.80

0.87

0.82–0.92

0.78–0.85

Age

1.07

1.07, 1.07

1.07

1.07, 1.07

1.07, 1.07

Education (years of schooling)

 None (0)

1 (reference)

1 (reference)

1 (reference)

 Primary school (1–5)

1.01

0.96–1.05

0.97

0.91–1.03

0.95–1.02

 Middle school or higher (> 5)

0.95

0.89–1.01

0.85

0.76–0.96

0.87–0.97

Ethnicity

 Han

1 (reference)

1 (reference)

1 (reference)

 Minority

1.09

1.01–1.18

1.15

1.09–1.22

1.08–1.18

Marital status

 Currently married and living with spouse

1 (reference)

1 (reference)

1 (reference)

 Separated/divorced/never married/Widowed

1.32

1.26–1.39

1.46

1.34–1.58

1.30–1.41

Place of residence

 Urban

1 (reference)

1 (reference)

1 (reference)

 Rural

1.07

1.03–1.12

1.07

1.04–1.11

1.04–1.10

Occupation before age 60

 Manual

1 (reference)

1 (reference)

1 (reference)

 Non-manual

1.1

1.02–1.18

1.15

0.99–1.33

1.04–1.19

Living arrangements

 With household member(s)

1 (reference)

1 (reference)

1 (reference)

 Alone

0.83

0.78–0.88

0.76

0.73–0.80

0.76–0.82

 In an institution

1.12

1.01–1.23

1.17

1.08–1.27

1.07–1.22

Smoking status

 Never smoker

1 (reference)

1 (reference)

1 (reference)

 Former smoker

1.14

1.09–1.20

1.18

1.12–1.25

1.12–1.20

 Current smoker

1.05

1.00–1.10

1.02

0.96–1.10

1.00–1.09

Physical activity

 No

1 (reference)

1 (reference)

1 (reference)

 Yes

0.68

0.65–0.71

0.69

0.66–0.72

0.66–0.71

Drinking status^b

 Never/former

1 (reference)

1 (reference)

1 (reference)

 Light

0.96

0.90–1.03

0.97

0.90–1.06

0.92–1.02

 Heavy

0.91

0.86–0.96

0.97

0.92–1.03

0.90–0.98