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Table 1 Characteristics of 633 adults admitted to hospital with non-typhoidal Salmonella gastroenteritis in Liverpool between 1982 and 2006 and of the 364 patients who had a blood culture taken

From: A retrospective study of secondary bacteraemia in hospitalised adults with community acquired non-typhoidal Salmonella gastroenteritis

 

All patients

Patients with blood culture taken

Patients with no blood culture taken

p1

Positive blood culture

Negative blood culture

p2

Number

633

364

269

 

63

301

 

Median age (IQR, range) years

40 (26–64,16-98)

39 (26–61,16-91)

42 (26–68,19-98)

0.083

62 (36–75,16-91)

35 (25–53,16-90)

<0.001

Age ≥ 65 years

150 (23.7)

76 (20.9)

74 (27.5)

0.059

27 (42.9)

49 (16.3)

<0.001

Male gender

300 (47.4)

171 (47.0)

129 (48.0)

0.810

31 (49.2)

140 (46.5)

0.782

Current smoker

216 (34.1)

113 (31.0)

103 (38.3)

0.573

20 (31.7)

93 (30.9)

0.895

Current alcohol user

369 (58.3)

224 (61.5)

145 (53.9)

0.541

35 (55.6)

189 (62.8)

0.283

Recent travel history

79 (12.5)

49 (13.5)

30 (11.2)

0.398

7 (11.1)

42 (14.0)

0.686

Chronic disease

202 (31.9)

113 (31.0)

89 (33.1)

0.605

29 (46.0)

84 (27.9)

0.007

Hypochlorhydria

71 (11.2)

39 (10.7)

32 (11.9)

0.703

13 (20.6)

26 (8.6)

0.012

Recent antibiotic therapy

56 (8.8)

32 (8.8)

24 (8.9)

1.00

2 (3.2)

30 (10.0)

0.091

Duration symptoms > 4 days

255 (40.3)

134 (36.8)

121 (45.0)

0.041

26 (41.3)

108 (35.9)

0.473

Bloody diarrhoea

126 (19.9)

65 (17.9)

61 (22.7)

0.158

16 (9.5)

59 (19.6)

0.070

Abdominal pain

493 (77.9)

284 (78.0)

209 (77.7)

0.923

44 (69.8)

240 (79.7)

0.095

Vomiting

427 (67.5)

265 (72.8)

162 (60.2)

0.001

47 (74.6)

218 (72.4)

0.876

Pyrexia

234 (37.0)

199 (49.5)

54 (20.1)

<0.001

27 (42.9)

153 (50.8)

0.270

Rigors

95 (15.0)

83 (22.8)

12 (4.5)

<0.001

8 (12.7)

75 (24.9)

0.046

Headache

142 (22.4)

108 (29.7)

34 (12.6)

<0.001

15 (23.8)

93 (30.9)

0.291

Cough

46 (7.3)

32 (8.8)

14 (5.2)

0.091

7 (11.1)

25 (8.3)

0.466

Admission temperature > 38°C3

124 (19.7)

108 (29.9)

16 (6.0)

<0.001

17 (27.0)

91/298 (30.5)

0.683

Admission pulse > 90/min 4

242 (38.5)

151 (41.8)

91 (34.1)

0.006

32 (51.6)

119/299 (39.8)

0.112

Admission systolic blood pressure < 90 mmHg 4

13 (2.1)

11 (3.1)

2 (0.8)

0.084

6 (10.0)

5 (1.7)

0.004

Dehydration

321 (50.7)

215 (59.1)

106 (39.4)

<0.001

45 (71.4)

170 (56.5)

0.034

Abdominal tenderness

330 (52.1)

199 (54.7)

131 (48.7)

0.148

29 (46.0)

170 (56.5)

0.164

Mental impairment

34 (5.4)

27 (7.2)

7 (2.6)

0.007

12 (19.0)

15 (5.0)

0.001

Lecocytosis 5

92 (14.8)

66 (18.2)

26 (10.1)

0.008

15 (23.8)

51/300 (17.0)

0.274

Leucopenia 6

27 (4.4)

19 (5.2)

8 (3.1)

0.235

5 (7.9)

14 (4.7)

0.345

Anaemia 7

44 (7.1)

29 (8.0)

15 (5.9)

0.344

6 (9.5)

23 (7.7)

0.611

Elevated urea 8

189 (30.6)

113 (31.4)

76 (29.6)

0.658

39 (61.9)

74 (24.9)

< 0.001

  1. Data are number (%), except where stated.
  2. 1 Comparison of patients with blood culture taken and patients without blood culture taken.
  3. 2 Comparison of patients with a positive blood culture and patients with a negative blood culture among the 354 patients who had a blood culture taken.
  4. 3 n = 628.
  5. 4 n = 605.
  6. 5 White blood cell count >12.0 × 109/L; n = 620.
  7. 6 White blood cell count <4.0 × 109/L; n = 620.
  8. 7 Haemoglobin <11 g/dl in females and <13 g/dl in males; n = 619.
  9. 8 Urea >7.5 mmol/l; n = 617.