Table 10. The distribution of promoter usage; CpG-richness and AP usage are considered to highlight differences between SCs and non SCs.

Promoter type	Mean±Standard Deviation		P-value
	SC	NC
CpG-rich	41.33±3.48	34.15±2.44	0.0001072
CpG-less	53.52±3.07	59.65±2.61	0.0007695
CpG-mixed	5.15±1.79	6.20±0.68	0.04948
AP	19.89±3.20	20.52±1.88	0.5677

P-values calculated using the Welch two sample t-tests. The promoter classifications rely on the methods described in part 3 ( Fig 1 ). The notes for Table 5 provide further explanations.