Table 1 Characteristics of patients (N = 141) by type of liver abscess (pyogenic or amoebic)

Sex

Male

84 (63.6%)

9 (100.0%)

Age (years)

Median (IQR)

68 (51–78)

41 (37–51)

Ethnicity

White (British or Other)

47 (35.6%)

1 (11.1%)

Indian/Pakistani

33 (25.0%)

5 (55.6%)

Asian

19 (14.4%)

3 (33.3%)

Other

17 (12.9%)

0 (0.0%)

Caribbean

13 (9.9%)

0 (0.0%)

African

3 (2.3%)

1 (11.1%)

Number of organisms^a

0

51 (38.6%)

–

1

62 (47.0%)

–

2

9 (6.8%)

–

3

8 (6.1%)

–

4

2 (1.5%)

Organism

None

51 (38.6%)

–

Grouped for analysis

Enterobacteriaceae

14 (10.6%)

–

E. Coli

21 (15.9%)

Klebsiella spp.

21 (15.9%)

S. milleri group

19 (14.4%)

–

Other Strep spp.

7 (5.3%)

Anaerobe

16 (12.1%)

–

Grouped as ‘other’ for analysis

Enterococcus

5 (3.8%)

Staphylococcus aureus

1 (0.8%)

–

Pseudomonas aeriginosa

2 (1.5%)

–

Other (Anaeroglobus, Haemophilus, Corynebacterium, Sutterella)

5 (3.8%)

–

Number of abscesses identified

1

75 (56.8%)

7 (77.8%)

2

19 (14.4%)

1 (11.1%)

≥3

38 (28.8%)

1 (11.1%)

Maximum diameter (cm)

Median (IQR)

6.1 (4.8–9.0), n = 118

7.3 (5.8–8.8), n = 8

Loculated

52 (39.4%)

1 (11.1%)

Antimicrobial resistance^b

45 (34.1%)

–

Abscess aspirated/drained

79 (59.9%)

6 (66.7%)

Diabetic

36 (27.3%)

3 (33.3%)

Recent travel (< 1 year)

23 (21.1%)

6 (66.7%)

Immunosuppression (chemotherapy, steroids, immunotherapy or combination in previous year)

18 (13.6%)

0 (0.0%)

Died within 30 days

7 (5.3%)

0 (0.0%)

Died within 6 months

20 (15.2%)

0 (0.0%)