Table 1.

50 adults at least 65 years old were randomized to receive either high dose or standard dose IIV. Comparison of age was calculated with an unpaired t-test. Comparisons between doses for seroprotection at day 28 and seroconversion were calculated with Fisher’s exact test.

	Standard dose n=24	High dose n =26	p
Age mean (IQR)	73 (68, 77)	72 (65, 77)	0.45
H1N1
Seroprotection	54%	81%	0.03
Seroconversion	33%	54%	0.16
H3N2
Seroprotection	46%	87%	0.002
Seroconversion	25%	81%	<0.001
B
Seroprotection	58%	81%	0.12
Seroconversion	4%	46%	<0.001