. 2021 Jul 23;22:210. doi: 10.1186/s12931-021-01802-z

Table 6.

Additive interaction of lung disease history, family lung cancer history and environmental exposure index score among non-smokers

Index	Lung disease history and family lung cancer history^b	Lung disease history and EEI^a,c	Family lung cancer history and EEI^a,d
RERI	− 3.814 (− 8.150, 0.521)	7.343 (0.508, 14.178)^*	11.510 (− 2.227, 25.248)
AP	− 3.138 (− 15.308, 9.033)	0.603 (0.368, 0.839)^*	0.637 (0.327, 0.947)^*
S	0.054 (0.000, 687, 248.783)	2.920 (1.496, 5.697)^*	3.070 (1.206, 7.818)^*

^*Statistical significance

^aEEI was dichotomous variable in this analysis, was classified as low and intermediate-high

^bAdjusted for sex, age, marriage, education, occupation and EEI

^cAdjusted for sex, age, marriage, education, occupation and family lung cancer history

^dAdjusted for sex, age, marriage, education, occupation and lung disease history