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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.