元回归中效应量的最小个数需求：基于统计功效和估计精度

方俊燕, 张敏强

What is the minimum number of effect sizes required in meta-regression? An estimation based on statistical power and estimation precision

FANG Junyan, ZHANG Minqiang

附表4 包含两个调节变量时不同效应量个数下的参数估计偏差(z-test)

k τ2 = 0.08 τ2 = 0.32 β = (0, 0) β = (0.2, 0.2) β = (0.5, 0.5) β = (0.2, 0.5) β = (0, 0) β = (0.2, 0.2) β = (0.5, 0.5) β = (0.2, 0.5) 20 -0.0003 -0.0002 0.0009 0.0006 0.0005 -0.0002 0.0000 0.0000 40 -0.0008 -0.0001 0.0000 -0.0002 0.0002 -0.0002 0.0002 0.0010 60 0.0001 -0.0002 -0.0004 -0.0001 0.0010 0.0002 0.0005 0.0001 80 0.0000 -0.0003 -0.0001 0.0002 0.0005 -0.0002 -0.0001 0.0001 100 0.0001 0.0000 0.0000 0.0000 0.0006 -0.0003 0.0000 0.0002 120 0.0001 0.0002 0.0005 -0.0001 0.0005 0.0005 0.0000 0.0004