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Table 1 Characteristics of the patients with IDU-IE and non-IDU-IE admitted between 2008 and 2017

From: Patients with infective endocarditis and history of injection drug use in a Swedish referral hospital during 10 years

Clinical characteristics

IDU-IE (n = 165 (%))

Non-IDU IE (n = 357 (%))

P value

Women

55 (33)

119 (33)

1.00

Men

110 (67)

238 (67)

1.00

Age, mean (± SD); median (25th and 75th percentiles)

41.6 (11.9); 44 (31, 50)

64.3 (16.4); 67 (56, 76)

<  0.01

Predisposing factors

 Bicuspid aortic valve

0 (0)

20 (6)

< 0.01

 Prosthetic valve

12 (7)

83 (23)

<  0.01

 CIED

2 (1)

38 (11)

<  0.01

 Rheumatic heart disease

0 (0)

2 (1)

1.00

 Congenital heart disease

0 (0)

8 (2)

0.06

 History of IE

49 (30)

34 (10)

<  0.01

 Known valvular disease

3 (2)

78 (22)

<  0.01

 Heart failure before or under IE treatment

19 (12)

45 (13)

0.72

Patients fulfilling Duke’s major criteria

 Blood culture positive for IE

144 (87)

304 (85)

0.78

 Echocardiography positive for IEa

165 (100)

287 (80)

<  0.01

Patients fulfilling Duke’s minor criteria

 Fever

150 (91)

304 (85)

0.07

 Vascular phenomena

101 (61)

120 (34)

<  0.01

 Spondylitis

25 (15)

30 (9)

0.02

 Pulmonary septic emboli

55 (33)

11 (3)

< 0.01

 New heart murmur

20 (12)

63 (18)

0.11

 Immunological phenomenon

2 (1)

19 (5)

0.03

Outcomes

 Surgery

27 (16)

121 (34)

<  0.01

 In-hospital mortality

7 (4)

27 (8)

0.15

 Relapse during follow upb

1 (0)

4 (1)

1.00

 Re-infected during follow upb

2 (1)

1 (0)

0.24

  1. aIn total, 101 (61%) of the IDU-IE patients underwent transthoracic echocardiography and 137 (83%) patients underwent transoesophageal echocardiography during hospital stay. bFollow up within 6 months from discharge. Significant P values are marked in bold font. Abbreviations: CIED cardiovascular implantable electronic device; IDU injection drug use; IE infective endocarditis; n number of patients; SD standard deviation