. 2008 Jul 30;25(10):2199–2209. doi: 10.1093/molbev/msn166

Table 2.

Partial Rank Correlation Coefficients between 5 Predictor Variables and NI, Computed Separately for Genes from Species with Close Outgroups and Species with Distant Outgroups^a

Predictor Variable	Close Outgroup (N = 4,410)	Distant Outgroup (N = 5,943)
π_Adev	0.747^b	0.684^b
π_Sdev	0.340^b ^c	−0.523^b ^c
k_Adev	−0.412^b ^c	−0.422^b ^c
k_Sdev	0.305^b ^c	0.400^b ^c
PC1	−0.020^c	−0.102^b ^c

Each value is a fourth-order partial rank correlation between the predictor variable and NI simultaneously controlling for the other 4 predictor variables.

Tests of the hypothesis that a given partial rank correlation coefficient equals zero: P < 0.001.

Tests of the hypothesis that a given partial rank correlation coefficient equals that between π_Adev and NI: P < 0.001.