Table 1 Clinical and laboratory features at admission.

Median (interquartile range) age, days

6 (2-15)

4 (0-11)

1.04 (1.01-1.05)

0.002

1.01 (0.99-1.03)

0.44

Males (%)

83 (58.5)

840 (58.7)

1.12 (0.75-1.49)

0.75

-

-

Median weight (kg) [95%CI]

2.94 [2.46-3.29]

2.74 [2.04-3.18]

6.21(1.0-38.7)

0.05

1.00(0.99-1.00)

0.52

Fever (%)

75 (52.8)

502 (35.1)

2.14 (1.52-3.03)

<0.001

1.63 (1.10-2.43)

0.02

Irritability (%)

11(7.7)

25 (1.7)

4.61 (2.22-9.57)

<0.001

2.53 (1.04-6.17)

0.04

Inability to breast feed (%)

36 (25.4)

503 (35.2)

1.58 (1.08-2.33)

0.02

1.13 (0.71-1.81)

0.53

Bulging fontanel (%)

14 (9.9)

16 (1.0)

10.22 (4.9-21.1)

<0.001

5.94 (2.65-13.30)

<0.001

Hypoglycaemia (%)

23 (16.2)

254 (17.7)

0.91 (0.58-1.44)

0.69

-

-

Hyponatraemia (%)

4 (2.8)

43 (2.9)

0.92 (0.32-1.59)

0.87

-

-

Hypernatraemia (%)

3 (2.1)

9 (0.6)

3.34 (0.89-12.47)

0.07

-

-

Hypokalaemia (%)

12 (8.1)

130 (8.9)

0.90 (0.49-1.67)

0.75

-

-

Hyperkalaemia (%)

14 (9.5)

119 (8.2)

1.18 (0.66-2.11)

0.58

-

-

Positive cerebral spinal fluid culture (%)

9 (8.4)

11 (1.9)

14.01 (6.01-32.47)

<0.001

14.08 (3.60-55.09)

<0.001

Positive blood culture (%)

10 (7.0)

76 (5.3)

1.32(0.67-2.61)

0.80

-

-