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. 2015 Jan 7;211(12):1969–1976. doi: 10.1093/infdis/jiu841

Table 3.

Poliovirus Neutralizing Antibody Geometric Mean Titers (GMTs) at Baseline and After Receipt of Inactivated Polio Vaccine (IPV) Booster

Group, IPV Formulation Serotype 1, GMT (95% CI)
Serotype 2, GMT (95% CI)
Serotype 3, GMT (95% CI)
Baseline After Booster Baseline After Booster Baseline After Booster
Group 1, 40% ID 44 (31–64) 1715 (1174–2504) 33 (24–44) 2188 (1507–3178) 14 (10–20) 2375 (1423–3963)
Group 2, 20% ID 42 (29–59) 976 (730–1304) 53 (37–76) 1438 (984–2101) 20 (14–28) 1698 (1114–2588)
Group 3, 100% IM 42 (30–58) 1249 (916–1705) 36 (26–51) 1489 (1041–2128) 16 (11–21) 1792 (1133–2835)
Group 4, 40% IM 34 (20–56) 1328 (795–2219) 44 (29–66) 1938 (1232–3047) 11 (7–16) 2075 (1225–3514)

There were data on baseline GMT for 66, 66, 66, and 33 subjects and on postbooster GMT for 65, 63, 64, and 32 subjects for groups 1, 2, 3, and 4, respectively. There were no significant differences between study groups for either baseline or postbooster GMTs.

Abbreviations: CI, confidence interval; ID, intradermal; IM, intramuscular.