Table 2.

Case-Control Studies on the Association of NPC with Dietary Habits

Factors	Study	P-value
Salted fish	Yong et al, (2017)	0.033
	Liu et al., (2017)	0.02
	Xie et al., (2015)	0.199
	He et al., (2015)	<0.001
	Ghosh et al., (2014)	0.02
	Lakhanpal et al., (2014)	0.47
	Jia et al., (2010)	0.001
	Guo et al., (2009)	<0.001
Salted meat, Salted vegetables, Preserved vegetables & Smoked meat	Yong et al, (2017)	0.003, <0.001& 0.54, 0.06 respectively
	Lourembam et al., (2015)	<0.001
	Ghosh et al, (2014)	0.03
Intake of dark green vegetables	Xie et al., (2015)	0.001
	He et al., (2015)	<0.001
Habitual drinking of herbal tea	Xie et al., (2015)	0.012