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Table 3 Comparison of the risk for ACS between older patients with and without CP using competing risk survival analysis

From: Association between chronic pain and acute coronary syndrome in the older population: a nationwide population-based cohort study

Variable

Older patients with CP

Older patients without CP

Crude sHR

(95% CI)

Adjusted sHR

(95% CI)*

Mortality (%)

ACS (%)

Mortality (%)

ACS (%)

Overall analysis

9061 (52.6)

1021 (5.9)

7782 (45.1)

776 (4.5)

1.33 (1.21 − 1.46)

1.18 (1.07 − 1.30)

Stratified analysis

      

Age subgroups

      

65–74 years

4169 (41.3)

558 (5.5)

3299 (32.7)

390 (3.9)

1.45 (1.27 − 1.65)

1.21 (1.06 − 1.39)

75–84 years

4215 (66.3)

426 (6.7)

3853 (60.6)

351 (5.5)

1.22 (1.06 − 1.41)

1.13 (0.97 − 1.31)

≥85 years

677 (86.2)

37 (4.7)

630 (80.3)

35 (4.5)

1.07 (0.67 − 1.69)

1.06 (0.66 − 1.70)

Sex

      

Male

4478 (58.2)

517 (6.7)

4012 (52.2)

407 (5.3)

1.28 (1.13 − 1.46)

1.15 (1.00 − 1.32)

Female

4583 (48.0)

504 (5.3)

3770 (39.5)

369 (3.9)

1.38 (1.21 − 1.58)

1.21 (1.05 − 1.39)

Underlying comorbidity

      

Hypertension

5087 (52.8)

677 (7.0)

3182 (48.8)

383 (5.9)

1.20 (1.06 − 1.36)

1.18 (1.04 − 1.34)

Diabetes

2253 (59.8)

317 (8.4)

1490 (56.9)

197 (7.5)

1.12 (0.94 − 1.34)

1.10 (0.92 − 1.31)

Hyperlipidemia

937 (42.9)

155 (7.1)

578 (39.2)

94 (6.4)

1.11 (0.86 − 1.44)

1.08 (0.83 − 1.40)

Coronary artery disease

1898 (55.6)

270 (7.9)

1157 (51.5)

156 (6.9)

1.14 (0.94 − 1.39)

1.13 (0.93 − 1.38)

Malignancy

741 (73.2)

34 (3.4)

392 (61.8)

20 (3.2)

1.07 (0.62 − 1.85)

1.04 (0.58 − 1.86)

Stroke

1737 (63.2)

192 (7.0)

966 (65.1)

102 (6.9)

1.02 (0.81 − 1.30)

1.01 (0.79 − 1.28)

Dementia

316 (77.6)

23 (5.7)

212 (81.2)

9 (3.5)

1.66 (0.77 − 3.59)

1.75 (0.79 − 3.89)

Congestive heart failure

1653 (68.7)

192 (8.0)

1063 (69.4)

120 (7.8)

1.02 (0.81 − 1.28)

1.03 (0.81 − 1.29)

Chronic obstructive

pulmonary disease

2050 (61.9)

231 (7.0)

1150 (61.1)

95 (5.1)

1.39 (1.10 − 1.77)

1.32 (1.04 − 1.68)

Liver diseases

960 (58.8)

67 (4.1)

588 (55.7)

40 (3.8)

1.08 (0.83 − 1.60)

0.99 (0.66 − 1.47)

Renal diseases

944 (65.6)

117 (8.1)

581 (65.2)

70 (7.9)

1.04 (0.77 − 1.40)

0.99 (0.73 − 1.34)

Connective tissue disease

210 (51.5)

17 (4.2)

72 (40.0)

5 (2.8)

1.50 (0.56 − 4.08)

1.22 (0.46 − 3.22)

Mental disorder

4005 (53.7)

414 (5.6)

2432 (49.3)

237 (4.8)

1.16 (0.99 − 1.36)

1.09 (0.93 − 1.28)

Follow-up period

      

< 1 year

61 (0.4)

19 (0.1)

55 (0.3)

11 (0.1)

1.73 (0.82 − 3.63)

1.55 (0.74 − 3.27)

< 2 years

140 (0.8)

30 (0.2)

132 (0.8)

17 (0.1)

1.77 (0.97 − 3.20)

1.75 (0.96 − 3.18)

< 3 years

233 (1.4)

46 (0.3)

171 (1.0)

23 (0.1)

2.00 (1.21 − 3.30)

1.80 (1.07 − 3.01)

  1. * Adjusted for age subgroups, sex, and all underlying comorbidities, including hypertension, diabetes, hyperlipidemia, coronary artery disease, malignancy, stroke, dementia, congestive heart failure, chronic obstructive pulmonary disease, liver diseases, renal diseases, connective tissue disease, and mental disorder
  2. Abbreviations: ACS, acute coronary syndrome; sHR, sub-distribution hazard ratio; CI, confidence interval; CP, chronic pain