FIGURE 3.

Effect of ascertainment bias (B) on projected power in STRIDE. N_C = 2649, N_I = 2802, T = 40 mo, μ = 0.5, H^hyp = 0.8, w = 0.022, V^prot = 1.0000, V^redef = 1.0475, $r_C^{\mathrm{prot}}=0.148$, $r_C^{\mathrm{redef}}=0.089$, d = 0.025, A₁ = 0.966, A_2a = 0.667, A_2b = 0.771, $P_1^{\mathrm{prot}}=0.452$, $P_{2a}^{\mathrm{prot}}=0.116$, $P_{2b}^{\mathrm{prot}}=0.433$, $P_1^{\mathrm{redef}}=0.789$, $P_{2a}^{\mathrm{redef}}=0.789$. STRIDE, Strategies to Reduce Injuries and Develop Confidence in Elders [Colour figure can be viewed at wileyonlinelibrary.com]