Table 1

Number and percentage of influenza-related admissions in the study according to child characteristics and time period

VariableNumber of admissions (%)
Sex
 Male521 (56.1)
 Female406 (43.7)
 Missing2 (0.2)
Age group (years)
 <1 306 (32.9)
 1 143 (15.4)
 2–4 183 (19.7)
 5–15 297 (32.0)
High-risk conditions present
 No451 (48.5)
 Yes478 (51.5)
Time period
 October 2003 to March 2009
 (prepandemic period)
161 (17.3)
 October 2009 to March 2010
 (influenza A(H1N1)pdm2009 pandemic wave 2)
152 (16.4)
 October 2010 to March 2011
 (pandemic wave 3)
208 (22.4)
 October 2011 to March 2013
 (postpandemic period)
90 (9.7)
 October 2013 to March 2017
 (roll-out of universal childhood influenza vaccination programme)
318 (34.2)