Table 2.

Estimated influenza incidence per 1,000 in children 0–18 years of age.

	Study season	Hospitals catchment area	Norway
Outpatient cases	2015/16	0.60 (0.32–1.07)	0.39 (0.20–0.69)
	2016/17	0.52 (0.19–1.20)	0.39 (0.15–0.91)
	2017/18	1.26 (0.53–2.48)	0.93 (0.39–1.83)
	Total	0.74 (0.48–1.09)	0.52 (0.34–0.77)
Inpatient cases	2015/16	0.41 (0.31–0.53)	0.49 (0.37–0.64)
	2016/17	0.31 (0.18–0.52)	0.32 (0.19–0.53)
	2017/18	0.59 (0.42–0.82)	0.55 (0.39–0.77)
	Total	0.45 (0.37–0.54)	0.46 (0.38–0.56)
Total	2015/16	0.94 (0.71–1.21)	0.91 (0.69–1.17)
	2016/17	0.77 (0.48–1.22)	0.72 (0.44–1.13)
	2017/18	1.44 (1.02–1.99)	1.24 (0.87–1.71)
	Total	1.06 (0.88–1.28)	0.96 (0.80–1.16)