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Table 4 Factors of suicide attempts stratified by variables listed in the table by Cox proportional hazard model analysis

From: Insomnia as an independent predictor of suicide attempts: a nationwide population-based retrospective cohort study

Variables

With insomnia

Without insomnia

Ratio

Adjusted HR

95%CI

P-value

Event

PYs

Rate (per 103 PYs)

Event

PYs

Rate (per 103 PYs)

Total

1098

953,594

115.143

297

1,913,519

15.521

7.418

3.533

3.059

4.080

< 0.001

Gender

 female

633

468,954

134.981

153

941,910

16.244

8.310

4.186

3.429

5.111

< 0.001

 male

465

484,640

95.948

144

971,609

14.821

6.474

2.861

2.323

3.523

< 0.001

Age group (years)

 15–24

119

42,625

279.179

33

85,435

38.626

7.228

2.778

1.747

4.417

< 0.001

 25–44

546

198,523

275.031

80

400,512

19.974

13.769

5.546

4.236

7.262

< 0.001

 45–64

264

317,825

83.065

105

637,466

16.471

5.043

2.637

2.053

3.389

< 0.001

 ≧65

169

394,621

42.826

79

790,106

9.999

4.283

2.900

2.188

3.844

< 0.001

Low income

 no

987

915,626

107.795

288

1,884,404

15.283

7.053

3.487

3.009

4.040

< 0.001

 yes

111

37,968

292.351

9

29,115

30.912

9.458

4.069

2.012

8.228

< 0.001

Catastrophic illness

 no

635

645,939

98.306

220

1,504,259

14.625

6.722

3.769

3.171

4.479

< 0.001

 yes

463

307,655

150.493

77

409,260

18.814

7.999

2.916

2.255

3.770

< 0.001

Urbanization

 high

291

243,831

119.345

84

661,398

12.700

9.397

3.911

2.964

5.161

< 0.001

 medium

398

369,572

107.692

132

835,185

15.805

6.814

3.320

2.655

4.153

< 0.001

 low

409

340,191

120.227

81

416,936

19.427

6.188

3.355

2.592

4.342

< 0.001

Drug dependence

 no

1044

942,877

110.725

292

1,910,198

15.286

7.243

3.569

3.086

4.127

< 0.001

 yes

54

10,717

503.872

5

3321

150.557

3.347

2.079

0.817

5.286

0.207

Alcohol dependence

 no

978

916,596

106.699

288

1,899,319

15.163

7.037

3.513

3.032

4.072

< 0.001

 yes

120

36,998

324.342

9

14,200

63.380

5.117

3.844

1.936

7.634

< 0.001

Mental disorders

 no

300

618,043

48.540

181

1,763,589

10.263

4.730

4.798

3.968

5.801

< 0.001

 yes

798

335,551

237.818

116

149,930

77.369

3.074

2.223

1.823

2.711

< 0.001