Table 2.

Relationship of patient’s age to viral aetiology. Multinomial logistic regression model adjusted for year, surveillance scheme, region of sampling, and patient’s gender. Ecuador, 2009–2016.

	<1 year			1–4 years			5–17 years			18–39 years	40–64 years			65 + years
	RRR	95%CI	p	RRR	95%CI	p	RRR	95%CI	p	Reference category	RRR	95%CI	p	RRR	95%CI	p
Influenza A(H1N1)p	0.19	(0.16–0.23)	<0.001	0.39	(0.34–0.43)	<0.001	0.96	(0.86–1.07)	0.467	1.00	1.02	(0.92–1.14)	0.694	0.43	(0.36–0.50)	<0.001
Influenza A(H3N2)	0.46	(0.36–0.59)	<0.001	0.77	(0.62–0.96)	0.018	1.08	(0.84–1.39)	0.525	1.00	0.93	(0.72–1.19)	0.548	1.00	(0.77–1.28)	0.971
Influenza B	0.41	(0.29–0.58)	<0.001	0.73	(0.53–1.02)	0.065	1.43	(1.00–2.05)	0.050	1.00	0.87	(0.59–1.30)	0.503	0.72	(0.49–1.06)	0.094
RSV	34.18	(21.65–53.98)	<0.001	21.60	(13.69–34.06)	<0.001	5.01	(3.06–8.20)	<0.001	1.00	0.98	(0.52–1.86)	0.955	1.15	(0.63–2.10)	0.653
Adenovirus	9.02	(2.18–37.29)	0.002	17.18	(4.23–69.71)	<0.001	10.98	(2.58–46.66)	0.001	1.00	2.87	(0.58–14.27)	0.196	4.45	(0.97–20.39)	0.054
Parainfluenza	4.63	(2.88–7.44)	<0.001	4.25	(2.66–6.80)	<0.001	2.51	(1.48–4.28)	0.001	1.00	0.84	(0.43–1.64)	0.606	1.54	(0.87–2.73)	0.137
hMPV	2.66	(1.05–6.74)	0.039	5.31	(2.14–13.17)	<0.001	1.69	(0.58–4.90)	0.335	1.00	1.94	(0.69–5.48)	0.211	0.37	(0.09–1.56)	0.177

RRR: relative risk ratio. RSV: respiratory syncytial virus. hMPV: human metapneumovirus.