Table 3

Risk of hospitalisation: comparison within the LAIV cohort between period at risk and control period (within-cohort analysis)

Season 2013–2014
(n*=4560)
Incidence rate per 1000 person years (95% CI)Relative risk (95% CI)
Period at risk
(days 0–42)
Control period
(days 43–84)
Any hospitalisation2252380.93
(0.71 to 1.23)
Hospitalisation for lower respiratory event104
(79 to 135)
n†=56
95
(71 to 126)
n†=50
1.09
(0.73 to 1.63)