|
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
|
