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Table 2 Multivariable adjusted hazard ratios for CVD according to different levels of major risk factors

From: Classical risk factors of cardiovascular disease among Chinese male steel workers: a prospective cohort study for 20 years

Variables

Range

CVD events

Number

Person-years

Incidence (per

1000 person years)

HR

95%CI

SBP (mmHg)

< 120

88

1712

35895

2.45

1

-

 

120-139

136

1641

33646

4.04

1.52

1.16-1.99

 

140-159

99

635

12451

7.95

2.48

1.84-3.36

 

160-179

45

194

3465

12.99

3.59

2.47-5.24

 

≥ 180

23

56

831

27.68

7.56

4.71-12.14

DBP (mmHg)

< 80

75

1529

31955

2.35

1

-

 

80-89

111

1500

30971

3.58

1.49

1.11-2.00

 

90-99

96

751

15015

6.39

2.27

1.67-3.10

 

≥ 100

109

458

8347

13.06

4.19

3.07-5.71

PP (mmHg)

< 35

72

1099

23008

3.13

1

-

 

35-44

136

1737

35663

3.81

1.15

0.87-1.54

 

45-54

93

909

18289

5.09

1.41

1.03-1.93

 

≥ 55

90

493

9328

9.65

2.08

1.50-2.87

MAP (mmHg)

< 83.34

50

1112

23095

2.16

1

-

 

83.34-93.33

85

1335

27824

3.05

1.32

0.93-1.88

 

93.34-103.33

85

918

18885

4.5

1.75

1.23-2.50

 

≥ 103.34

171

873

16484

10.37

3.49

2.51-4.86

Cigarette dosage (cigarettes/day)

Non-smoker

85

1126

23280

3.65

1

-

 

1-9

89

1054

21334

4.17

1.37

1.02-1.85

 

10-19

153

1691

33991

4.5

1.47

1.12-1.92

 

≥ 20

64

367

7683

8.33

2.43

1.75-3.38

TC (mg/dl)

< 180

128

1879

38362

3.34

1

-

 

180-199.9

90

931

18968

4.74

1.14

0.87-1.50

 

200-219.9

77

682

13889

5.54

1.25

0.94-1.66

 

≥ 220

96

746

15069

6.37

1.42

1.08-1.85

BMI (kg/m2)

-

391

4238

  

1.06

1.02-1.09

  1. Adjusted for age, TC, BMI, SBP, and daily cigarette dosage.