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Table 2 Age Adjusted and Multivariable Adjusted Relative Risk According to Suicide and Other External Cause Injuries, China, 1991-1999

From: Mortality from suicide and other external cause injuries in China: a prospective cohort study

Sociodemographic characteristics

Suicide (n = 197)

Other external cause injuries (n = 591)

 

Age-adjusted

Multivariable-adjusted*

Age-adjusted

Multivariable-adjusted*

 

RR

95% CI

p-value

RR

95% CI

p-value

RR

95% CI

p-value

RR

95% CI

p-value

Sex

            

   Female

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   Male

1.03

0.78-1.36

0.83

1.15

0.87-1.52

0.34

1.93

1.63-2.29

<0.0001

2.19

1.85-2.60

<0.0001

Age (years)

            

   40-49

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   50-59

1.01

0.69-1.49

0.95

1.09

0.74-1.60

0.66

1.04

0.82-1.33

0.73

1.11

0.87-1.42

0.39

   60-69

1.46

0.99-2.16

0.06

1.56

1.05-2.31

0.03

2.17

1.74-2.72

<0.0001

2.28

1.82-2.86

<0.0001

   ≥ 70

3.34

2.26-4.94

<0.0001

3.60

2.43-5.34

<0.0001

4.55

3.62-5.72

<0.0001

4.84

3.84-6.09

<0.0001

Region

            

   South

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   North

0.97

0.73-1.29

0.84

1.41

1.05-1.89

0.02

0.78

0.67-0.92

<0.01

1.06

0.89-1.25

0.53

Urbanization

            

   Urban

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   Rural

4.43

3.18-6.18

<0.0001

3.97

2.72-5.79

<0.0001

3.04

2.55-3.62

<0.0001

3.02

2.47-3.70

<0.0001

BMI category (kg/m2)

           

   < 18.5

1.59

1.07-2.34

0.02

1.22

0.81-1.82

0.34

1.72

1.38-2.13

<0.0001

1.14

0.91-1.43

0.26

   18.5-24.9

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   ≥ 25

0.46

0.28-0.73

<0.01

0.66

0.40-1.08

0.10

0.46

0.35-0.61

<0.0001

0.69

0.52-0.92

0.01

Employment status

            

   Office worker

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   Labor worker*

4.72

2.28-9.74

<0.0001

1.41

0.62-3.22

0.41

2.56

1.84-3.56

<0.0001

1.20

0.81-1.76

0.37

   Unemployed

5.33

2.56-11.1

<0.0001

1.93

0.85-4.41

0.12

3.34

2.39-4.67

<0.0001

1.32

0.89-1.95

0.16

Education

            

   At least some HS

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   Less than HS

2.87

1.55-5.34

<0.01

1.55

0.80-3.01

0.20

2.48

1.82-3.38

<0.0001

1.54

1.10-2.14

0.01

   None

5.90

3.24-10.8

<0.0001

2.00

0.98-4.06

0.06

3.96

2.92-5.37

<0.0001

1.79

1.24-2.57

<0.01

Smoking

            

   Never

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   Ever smoker

1.07

0.78-1.45

0.69

0.93

0.64-1.35

0.71

1.54

1.30-1.82

<0.0001

1.09

0.89-1.33

0.41

Drinking

            

   Never

1.00

reference

 

1.00

reference

 

1.00

reference

 

1.00

reference

 

   Drinker

1.00

0.69-1.45

0.99

0.91

0.59-1.38

0.64

1.46

1.20-1.77

<0.0001

1.11

0.90-1.38

0.32

  1. RR = relative risk; CI = confidence interval; BMI = body mass index; HS = high school
  2. * Multivariable adjusted RR was calculated by adjusting for age, sex, region (north vs. south), and urbanization (urban vs. rural). Models included stratification by province to adjust for cluster sampling, except for the model for which region (north vs. south) was the main study variable.
  3. † Labor worker includes peasant, herdsman, fisherman, factory worker, and other labor worker; office worker includes professional, manager, clerk and service worker