Table 3. Statistical associations for methylation of NISCH in controls and cancer cases.

p values
pack/year in controls	Controls		Cancer (LNS and < 20 py)
	(LNS and < 20 py)	35+ py
LNS and < 20 py	-	< 0.0001	< 0.0001
≥ 20–35 py	< 0.0001	0.64	-
Combined (20+ py)	< 0.0001	-	-

LNS, lifetime non-smokers; py, pack/year.