Table 1.

Patients’ Characteristics.

a) Children (≤ 15 years)
	n	Age (mean)	Sex (M:F)	Comorbidityb n	Body Temperaturec (°C) (mean±SE)	Time from onset (hours±SE)
RIDT-positive	372	7.3	220:152	25	39.0±0.0*	20.3±0.8
Influenza total Aa	357	7.2	211:146	25	39.1±0.0*	20.0±0.9
Influenza A (H1N1) pdm09	133	7.3	77:56	8	39.2±0.1*	22.3±1.5d
Influenza A (H3N2)	224	7.2	134:90	17	39.0±0.1*	18.6±1.1
Influenza B	15	9.5 *	9:6	0	38.8±0.2	27.7±4.7
RIDT-negative	342	6.8	184:158	27	38.7±0.0	20.4±0.9e
b) Adults (≥ 16 years)
RIDT-positive	277	40.7	123:154	33	38.7±0.1*	25.7±1.1
Influenza total Aa	270	41.0	120:150	33	38.7±0.1 *	25.6±1.1
Influenza A (H1N1) pdm09	75	39.9	34:41	12	38.9±0.1 *	26.8±2.3
Influenza A (H3N2)	195	41.4 *	86:109	21	38.6±0.1*	25.1±1.3
Influenza B	7	31.0	3:4	0	39.2±0.3 *	30.1±7.7
RIDT -negative	342	38.5	167:175	42	38.3±0.1f	23.8±1.0g

* Statistically significant

RIDT: Rapid influenza diagnostic test

^aInfluenza total A: Influenza A (H1N1) pdm09 and Influenza A (H3N2)

^bComorbidities included: chronic disease of the lung (such as bronchial asthma), heart (such as ischemic heart disease), and kidney (such as chronic renal failure); endocrine metabolism disorder (such as diabetes mellitus); malignancy; autoimmune disorder (such as rheumatoid arthritis); neurological disease (such as epilepsy); pregnancy, and others (such as neurofibromatosis).

^cSE: standard error

^dThere is one value missing from the SE calculation (n=132).

^eIn cases of Influenza B, the mean value±SE of the time from onset of RIDT-negative controls was 20.4±1.0.

^fIn cases of Influenza both A (H1N1) pdm09 and B, the mean value±SE of the body temperature of RIDT-negative control was 38.3±0.0.

^gIn cases of Influenza both A (H1N1) pdm09 and B, the mean value±SE of the time from onset of RIDT-negative control was 23.8±1.1.