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Table 4 Power Using Controls in All Tests. CCa= Pearson's Chi-Square with twice as many controls as cases. CCb= Pearson's Chi-Square with four times as many controls as cases. LR 1 = likelihood ratio test with 1 df, LR 2 = likelihood ratio test with 2 df. Both likelihood tests used twice as many controls as cases.

From: Analysis of case-parent trios at a locus with a deletion allele: association of GSTM1 with autism

   r1 = 1 r1 = r 0 MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaadaGcaaqaaiabdkhaYnaaBaaaleaacqaIWaamaeqaaaqabaaaaa@2F43@ r1 = r0
   LR 1 LR 2 LR 1 LR 2 LR 1 LR 2
q r 0 CCa CCb CCa CCb CCa CCb
50 Case Trios
.25 2.0 0.24 0.20 0.13 0.13 0.07 0.11
   0.23 0.30 0.15 0.20 0.09 0.13
.50 2.0 0.51 0.42 0.21 0.19 0.06 0.11
   0.46 0.55 0.23 0.28 0.08 0.09
.75 2.0 0.53 0.43 0.20 0.16 0.06 0.08
   0.48 0.54 0.19 0.22 0.06 0.06
200 Case Trios
.25 2.0 0.69 0.60 0.35 0.33 0.11 0.27
   0.64 0.72 0.42 0.50 0.21 0.25
.50 2.0 0.98 0.96 0.64 0.58 0.09 0.27
   0.97 0.98 0.66 0.75 0.16 0.18
.75 2.0 0.98 0.96 0.61 0.53 0.06 0.13
   0.97 0.99 0.59 0.66 0.07 0.07