Table 3.

Correlations between Expression Levels and Various Gene Features.

Gene feature	Spearman’s Correlation with Expression and Associated P Values				Regression Coefficient (B) when Controlling for Variation in CDS Length
	All	Low	Medium	High	All	Low	Medium	High
CDS length	0.317	0.175	0.170	−0.097	—	—	—	—
	<0.0001	<0.0001	<0.0001	<0.0001	—	—	—	—
Total intron size	0.084	0.043	0.040	0.009	−0.05	0.041	−0.042	0.046
	<0.0001	0.072	0.009a	0.645	<0.0001	0.09	0.002	0.009
Average intron size	0.005	0.000	−0.006	0.034	−0.092	0.026	−0.075	0.056
	0.665	0.999	0.678	0.085	<0.0001	0.267	<0.0001	0.004
Intron density	0.17	−0.013	0.017	0.040	—	—	—	—
	0.124	0.576	0.257	0.042a	—	—	—	—

^aNonsignificant after sequential Bonferroni correction. Bonferroni correction was applied to correlation and regression analyses separately.