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. 2009 Feb 26;9:12. doi: 10.1186/1471-2288-9-12

Table 2.

Worst performance values for estimation of within-birth correlation for continuous outcomes

Operating characteristic

Randomization Method Mean bias Median bias
Same LMEM -0.014 0.019
GEE 0.053 0.050
Independent LMEM -0.020 0.014
GEE 0.047 0.042
Opposite LMEM -0.015 0.020
GEE 0.060 0.059