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Table 1 Empirical powers at markers near the QTL for RF-IgM on chromosome 11 at level 0.001

From: A nonparametric regression-based linkage scan of rheumatoid factor-IgM using sib-pair squared sums and differences

Marker Position NPDa NPSDb HEDc ECPd
STRP11_21 110 cM 0.10 0.23 0.06 0.11
STRP11_22 113 cM 0.10 0.23 0.06 0.13
STRP11_23 117 cM 0.10 0.23 0.06 0.13
STRP11_24 124 cM 0.09 0.21 0.05 0.09
  1. aNPD, nonparametric regression using squared differences only
  2. bNPSD, nonparametric regression using both squared sums and squared differences
  3. cHED, Haseman-Elston regression using squared differences [10]
  4. dECP, Elston et al. regression using mean-corrected cross-products [7]