Table 3.

HRs of the predictors of influenza vaccination rate among children and adolescents without high-risk condition; presentation by age group

	2–3 year olds		4–8 year olds		9–17 year olds
	Estimate 95% CI	p Value	Estimate 95% CI	p Value	Estimate 95% CI	p Value
Season
2012–2013	1.00*		1.00*		1.00*
2013–2014	59.91 (56.13 to 64.04)		4.01 (3.84 to 4.20)		2.55 (2.47 to 2.64)
2014–2015	53.97 (50.56 to 57.69)	<0.001	12.62 (12.11 to 13.16)	<0.001	3.50 (3.39 to 3.61)	<0.001
Sex		<0.01†		<0.001†		0.10†
Male	1.00*		1.00*		1.00*
Female	0.99 (0.98 to 1.01)	0.44	0.95 (0.94 to 0.97)	<0.001	1.06 (1.04 to 1.08)	<0.001
Region		<0.001†		<0.001†		<0.001†
England/North	0.93 (0.90 to 0.95)		2.75 (2.66 to 2.84)		1.92 (1.84 to 2.00)
England/Midlands	0.92 (0.90 to 0.94)		1.14 (1.09 to 1.18)		1.68 (1.61 to 1.75)
England/South	1.00*		1.00*		1.00*
England/London	0.68 (0.66 to 0.70)		1.50 (1.44 to 1.56)		1.08 (1.03 to 1.13)
Northern Ireland	1.93 (1.87 to 2.00)		0.89 (0.83 to 0.96)		2.26 (2.14 to 2.39)
Scotland	1.21 (1.19 to 1.24)		5.18 (5.03 to 5.34)		4.53 (4.38 to 4.69)
Wales	0.82 (0.79 to 0.84)	<0.001	0.91 (0.87 to 0.96)	<0.001	2.74 (2.64 to 2.85)	<0.001

*Reference group.

†p Value of the interaction term between season and each other predictor.