Table 4 Factors of cardiomyopathy stratified by variables listed in the table by using Cox regression and bonferroni correction for multiple comparisons.

From: Increased risk of cardiomyopathy in individuals with methamphetamine related disorders in Taiwan

Methamphetamine—related

disorders

With

Without

(Reference)

With vs. without

(Reference)

Stratified

Events

PYs

Rate

Events

PYs

Rate

aHR

95% CI

p-value

Total

153

198,273.14

77.17

274

793,065.24

34.55

3.421

1.589

5.014

< 0.001

Sex

 Male

101

139,782.56

72.26

194

557,110.79

34.82

3.178

1.474

4.659

< 0.001

 Female

52

58,490.58

88.90

80

235,954.45

33.90

4.011

1.862

5.888

< 0.001

Age group (yrs)

 20–49

78

128,457.63

60.72

142

457,925.30

31.01

2.978

1.396

4.384

< 0.001

 50–64

21

24,379.81

86.14

56

144,898.36

38.65

3.402

1.587

5.013

< 0.001

≧ 65

54

45,435.70

118.85

76

190,241.58

39.95

4.551

2.110

6.682

< 0.001

Insured premium (NT$)

 < 18,000

131

189,052.24

69.29

240

721,780.11

33.25

3.101

1.472

4.683

< 0.001

 18,000–34,999

3

2,789.33

107.55

19

53,657.59

35.41

4.248

2.159

6.580

< 0.001

≧ 35,000

19

6,431.57

295.42

15

17,627.54

85.09

5.303

2.471

7.774

< 0.001

Season

 Spring

32

43,498.25

73.57

60

177,666.14

33.77

3.333

1.551

4.897

< 0.001

 Summer

43

53,782.11

79.95

81

232,098.25

34.90

3.522

1.638

5.149

< 0.001

 Autumn

30

49,818.66

60.22

58

194,186.31

29.87

3.024

1.421

4.505

< 0.001

 Winter

48

51,174.12

93.80

75

189,114.54

39.66

3.622

1.689

5.311

< 0.001

Urbanization level

 1 (The highest)

59

69,525.04

84.86

75

208,893.35

35.90

3.611

1.690

5.303

< 0.001

 2 (Second)

61

75,297.63

81.01

93

268,334.42

34.66

3.572

1.667

5.247

< 0.001

 3 (Third)

18

22,973.71

78.35

51

148,185.80

34.42

3.485

1.624

5.111

< 0.001

 4 (The lowest)

15

30,476.76

49.22

55

167,651.67

32.81

2.291

1.065

3.368

0.018

Level of care

 Hospital center

51

61,818.24

82.50

89

251,716.87

35.36

3.578

1.662

5.270

< 0.001

 Regional hospital

75

95,809.17

78.28

94

271,784.30

34.59

3.432

1.598

5.011

< 0.001

 Local hospital

27

40,645.73

66.43

91

269,564.07

33.76

3.012

1.325

4.106

< 0.001

  1. PYs = Person-years; Rate: per 105 PYs; AHR = Adjusted Hazard ratio: Adjusted for the variables listed in Table 3; CI = confidence interval.