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Table 4 Person years, number of deaths, hazard ratios (HRs) and 95% confidence intervals (CIs) for all-cause, CVD, IHD and stroke mortality in women stratified by educational groups*, Mumbai Cohort Study, Mumbai, Maharashtra, India

From: Illiteracy, low educational status, and cardiovascular mortality in India

Women

Illiterate

Primary school

Middle school and above

   

Middle school

Secondary school

College

Sub total

Person years

147,971

116,063

46,739

14,145

5320

66,204

All-deaths (n)

2417

762

160

54

19

233

Death rates per 100000 2

1444

949

896

981

962

918

HR1

95% CI

1.0

0.41

(0.38-0.44)

0.21

(0.18-0.25)

0.24

(0.18-0.31)

0.22

(0.14-0.35)

0.22

(0.19-0.25)

HR2

95% CI

1.0

0.68

(0.63-0.74)

0.61

(0.52-0.72)

0.64

(0.49-0.84)

0.57

(0.36-0.90)

0.61

(0.53-0.71)

HR3

95% CI

1.0

0.72

(0.66-0.79)

0.66

(0.56-0.78)

0.72

(0.55-0.95)

0.66

(0.42-1.04)

0.67

(0.58-0.78)

HR4

95% CI

1.0

0.78

(0.71-0.85)

0.70

(0.59-0.82)

0.77

(0.58-1.02)

0.70

(0.44-1.10)

0.71

(0.62-0.82)

CVD 5 deaths (n)

721

234

39

24

7

70

Death rates per 100000 2

429

301

267

426

317

306

HR1

95% CI

1.0

0.41

(0.35-0.47)

0.17

(0.12-0.23)

0.34

(0.23-0.51)

0.26

(0.13-0.56)

0.21

(0.16-0.27)

HR2

95% CI

1.0

0.69

(0.60-0.80)

0.55

(0.40-0.76)

1.04

(0.69-1.57)

0.74

(0.35-1.56)

0.68

(0.53-0.87)

HR3

95% CI

1.0

0.73

(0.62-0.85)

0.59

(0.42-0.82)

1.17

(0.77-1.77)

0.84

(0.40-1.79)

0.73

(0.57-0.95)

HR4

95% CI

1.0

0.75

(0.64-0.88)

0.59

(0.42-0.82)

1.17

(0.77-1.79)

0.79

(0.37-1.69)

0.73

(0.56-0.94)

IHD 6 deaths (n)

303

106

18

12

3

33

Death rates per 100000 2

180

133

131

227

96

142

HR1

95% CI

1.0

0.44

(0.35-0.54)

0.18

(0.11-0.29)

0.40

(0.23-0.71)

0.27

(0.09-0.84)

0.24

(0.16-0.34)

HR2

95% CI

1.0

0.73

(0.59-0.92)

0.59

(0.37-0.96)

1.20

(0.67-2.14)

0.74

(0.24-2.31)

0.74

(0.52-1.07)

HR3

95% CI

1.0

0.78

(0.62-0.99)

0.65

(0.40-1.05)

1.39

(0.76-2.53)

0.87

(0.28-2.76)

0.82

(0.56-1.20)

HR4

95% CI

1.0

0.78

(0.62-0.99)

0.61

(0.37-1.00)

1.36

(0.74-2.48)

0.77

(0.24-2.44)

0.78

(0.53-1.14)

Stroke 7 deaths (n)

145

51

9

4

1

14

Death rates per 100000 2

87

67

58

47

50

54

HR1

95% CI

1.0

0.43

(0.32-0.60)

0.19

(0.10-0.37)

0.28

(0.10-0.75)

0.19

(0.03-1.33)

0.21

(0.12-0.36)

HR2

95% CI

1.0

0.72

(0.52-1.00)

0.60

(0.30-1.19)

0.85

(0.31-2.29)

0.51

(0.07-3.68)

0.65

(0.37-1.13)

HR3

95% CI

1.0

0.76

(0.54-1.06)

0.64

(0.32-1.27)

0.94

(0.34-2.59)

0.58

(0.08-4.17)

0.69

(0.39-1.24)

HR4

95% CI

1.0

0.78

(0.55-1.10)

0.64

(0.32-1.29)

0.95

(0.34-2.63)

0.57

(0.08-4.17)

0.70

(0.39-1.25)

  1. *Illiterate, Primary school (≤ 5 years of formal education), Middle school (6-8 years), Secondary school (9-10 years) and College (> 10 years)
  2. 1 crude hazard ratios (HRs), 2 adjusted for age, 3 adjusted for age and tobacco use, 4 adjusted for age, tobacco use, BMI, religion and mother tongue, 5 all circulatory system related deaths (ICD-10 codes I00-99), 6 Ischemic Heart Disease deaths (I20-25), 7 cerebrovascular deaths (I60-69)