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Table 3 Factors associated with stroke stratified by variables listed in the table by using Cox regression

From: Association between hypertensive pregnancy disorders and future risk of stroke in Taiwan: a Nationwide population-based retrospective case-control study

Hypertensive pregnancy disorders

With

Without (Reference)

Ratio

Adjusted HR

95% CI

95% CI

P

Stratified

Events

PYs

Rate (per 105 PYs)

Events

PYs

Rate (per 105 PYs)

Total

198

163,208.79

121.32

698

654,982.30

106.57

1.138

2.134

1.817

2.505

< 0.001

Age group (years)

 12–19

2

271.80

735.83

3

589.64

508.78

1.446

2.711

2.308

3.182

< 0.001

 20–29

64

32,914.98

194.44

87

80,370.21

108.25

1.796

3.367

2.867

3.953

< 0.001

 30–39

97

77,048.17

125.90

303

238,213.86

127.20

0.990

1.855

1.580

2.178

< 0.001

 40–49

34

18,003.53

188.85

294

137,974.59

213.08

0.886

1.661

1.415

1.950

< 0.001

 ≧50

1

34,970.30

2.86

11

197,833.99

5.56

0.514

0.964

0.821

1.132

0.276

Insured premium (USD)

  < 7200

191

125,404.75

152.31

688

466,665.85

147.43

1.033

1.937

1.649

2.273

< 0.001

 7200-13,999

5

2344.91

213.23

8

8975.42

89.13

2.392

4.484

3.818

5.264

< 0.001

  ≥ 14,000

2

35,459.13

5.64

2

179,341.03

1.12

5.058

9.481

8.073

11.129

< 0.001

DM

20

8430.94

237.22

56

42,672.99

131.23

1.808

3.389

2.885

3.978

< 0.001

HTN

54

13,688.23

394.50

99

35,172.46

281.47

1.402

2.627

2.237

3.084

< 0.001

Hyperlipidemia

13

1980.06

656.55

42

8226.33

510.56

1.286

2.411

2.052

2.830

< 0.001

Obesity

1

477.68

209.35

1

2343.45

42.67

4.906

9.196

7.830

10.795

< 0.001

Heart disease

14

5039.75

277.79

75

33,325.22

225.05

1.234

2.314

1.970

2.716

< 0.001

CKD

6

2500.94

239.91

40

23,770.74

168.27

1.426

2.673

2.276

3.137

< 0.001

Season

 Spring

52

30,039.53

173.11

146

109,482.26

133.35

1.298

2.433

2.072

2.856

< 0.001

 Summer

40

32,853.28

121.75

175

126,710.16

138.11

0.882

1.653

1.407

1.940

< 0.001

 Autumn

61

37,155.10

164.18

191

132,193.49

144.49

1.136

2.130

1.814

2.500

< 0.001

 Winter

45

63,160.87

71.25

186

286,596.39

64.90

1.098

2.058

1.752

2.416

< 0.001

Urbanization level

 1 (The highest)

75

43,701.39

171.62

225

153,595.67

146.49

1.172

2.196

1.870

2.578

< 0.001

 2

83

57,996.46

143.11

294

210,128.07

139.91

1.023

1.917

1.633

2.251

< 0.001

 3

16

10,060.20

159.04

40

46,748.29

85.56

1.859

3.484

2.967

4.090

< 0.001

 4 (The lowest)

24

51,450.75

46.65

139

244,510.27

56.85

0.821

1.538

1.310

1.806

< 0.001

Level of care

 Hospital center

96

43,471.31

220.84

301

142,056.49

211.89

1.042

1.954

1.663

2.293

< 0.001

 Regional hospital

64

50,293.76

127.25

215

183,114.94

117.41

1.084

2.032

1.730

2.385

< 0.001

 Local hospital

38

69,443.72

54.72

182

329,810.87

55.18

0.992

1.859

1.583

2.182

< 0.001

  1. PYs Person-years; Adjusted HR Adjusted hazard ratio: Adjusted for the variables listed in Table 3; CI confidence interval
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