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. Author manuscript; available in PMC: 2013 Jul 17.
Published in final edited form as: Biometrics. 2013 Feb 14;69(2):301–309. doi: 10.1111/biom.12014

Table 1.

Efficiency of PSN relative to EL

Relative Efficiencya
γV γP β0 β1 β2 β3 VE{S(1)} VENew(Δ)
1 0 1.05 1.08 1.05 1.07 1.08 1.06
1 1 1.03 1.17 1.04 1.18 1.36 1.22
5 0 1.00 1.00 1.00 1.00 0.99 0.99
5 5 1.03 1.07 1.04 1.08 1.08 1.08
10 0 1.00 1.00 1.00 1.00 1.00 1.00
10 10 1.07 1.07 1.08 1.07 1.07 1.08
16.62b 0 1.00 1.00 1.00 1.00 1.00 1.00
16.62b 15.5c 1.07 1.05 1.08 1.05 1.04 1.06
1 2 1.06 1.30 1.08 1.32 1.72 1.43
2 5 1.15 1.32 1.18 1.32 1.44 1.40
1 10 2.23 2.75 2.33 2.76 10.73 3.87
5 10 1.17 1.22 1.19 1.22 1.24 1.26
a

efficiency of PSN relative to EL = var(EL)/var(PSN)

b

γV = 16.62 corresponds to sampling all uninfected vaccinees

c

γP = 15.5 corresponds to sampling all uninfected placebo recipients