Table 4

ORs for the risk of community-acquired pneumonia hospitalisation in Non-admitted individuals during the influenza period using stratified analysis

	Non-admitted group*
	2006-vaccinated		2007-vaccinated
	OR (95% CI)	P value	OR (95% CI)	P value
Age group (years)
65–74	0.74 (0.60 to 0.91)	0.003	0.97 (0.78 to 1.22)	0.820
75–84	0.74 (0.61 to 0.89)	0.001	1.08 (0.86 to 1.33)	0.536
≥85	0.61 (0.42 to 0.89)	0.012	1.41 (0.93 to 2.08)	0.104
Gender
Male	0.69 (0.58 to 0.83)	<0.001	1.16 (0.96 to 1.41)	0.128
Female	0.77 (0.63 to 0.93)	0.009	0.94 (0.76 to 1.19)	0.648
CCI score†
0	0.73 (0.54 to 0.90)	0.041	1.08 (0.79 to 1.49)	0.629
1	0.76 (0.64 to 0.92)	0.043	1.07 (0.88 to 1.32)	0.492
2	0.62 (0.47 to 0.82)	0.001	1.16 (0.85 to 1.59)	0.346
3	0.75 (0.49 to 1.15)	0.192	0.70 (0.39 to 1.27)	0.241

*In the two consecutive years, the elderly who were not hospital admitted with pneumonia during the pre-vaccination period.
†CCI, Charlson Comorbidity Index.