Table 4.

Signs, symptoms and clinical manifestations in different influenza types for the children group

Clinical symptoms	Aa N = 35	B N = 63	A/H1N1 N = 18	P-value
Fever >38 °C	28(78%)	40(65%)	15(83%)	0.2
Cough	21(58%)	36(58%)	8(44%)	0.6
Rhinorrhoea	9(25%)	24(39%)	5(28%)	0.3
Sore throat	4(11%)	5(8%)	4(22%)	0.2
Shortness of breath	7(19%)	7(11%)	4(22%)	0.4
Abdominal pain	7(19%)	16(26%)	1(6%)	0.2
Vomiting	16(44%)	19(31%)	4(22%)	0.2
Diarrhoea	7(19%)	6(10%)	4(22%)	0.3
Vital signs
Saturation (mean ± s.d.) (%)	96.2 ± 4.6	96.5 ± 7.3	94.4 ± 6	0.5
Systolic blood pressure (mmHg)	106.5 ± 11.4	104.9 ± 15.7	105.7 ± 16.8	0.9
Diastolic blood pressure (mmHg)	64.4 ± 10.9	63 ± 12.7	65.1 ± 17.6	0.8
Laboratory tests
Leucocytes (1000/μl)	11.1 ± 6.7	7.7 ± 6.1	10.4 ± 6.3	0.03
Lymphocytes (1000/μl)	2.7 ± 2.5	2.2 ± 3.6	3.2 ± 2.5	0.5
Platelets (1000/μl)	312.7 ± 205.2	223.2 ± 96.7	261.4 ± 106.7	0.01
Neutrophils (%)	64.6 ± 18.3	63 ± 19.6	56.8 ± 18.3	0.4
Haemoglobin (g/dl)	12.1 ± 1	12.3 ± 1.8	11.4 ± 1.5	0.1
Complications
Pneumonia	2(6%)	0(0%)	4(22%)	0.001
Respiratory failure	0(0%)	1(2%)	1(6%)	0.3
Pleural effusion	1(3%)	0(0%)	0(0%)	0.3
Shock	0(0%)	3(5%)	1(6%)	0.4
Intensive care admission	1(3%)	3(5%)	4(22%)	0.02
Intubation and mechanical ventilation	0(0%)	3(5%)	2(11%)	0.2
Mortality	0(0%)	3(5%)	0(0%)	0.3
Hospitalisation
Symptom duration prior to admission (days)	4.2 ± 4	3.3 ± 2.6	2.7 ± 2.2	0.2
Antiviral treatment	28(78%)	52(84%)	16(89%)	0.6
Symptom duration prior to treatment (days)	4.6 ± 2.6	4.5 ± 3.0	3.7 ± 2.4	0.5
Hospitalisation duration (days)	2.8 ± 2.6	2.8 ± 3.1	5.2 ± 8.8	0.1

^aInfluenza A = A/non-H1N1.