Using p-value or chi-square to determine statistical data's significance?

I am involved an a science fair project at the provincial level and my partner and I have been doing a study about the co-relation between peoples personality and their likelyhood to have consumed "legal drugs" like caffeine or nicotine (the study was meant to be about other narcotics, but we weren't allowed to ask such questions). Anyay, we used the TPM (tridimensional personality model) to test people's personalities and founc co-relations between that and whether or not they've smoked or done something like that (which was asked on a survey). So we found that people wiuth high novelty seeking (trying new things: curiosity: behavioural activation), low harm avoidance (avoiding harm through one's actions: carefulness: behavioural inhibition) and average reward dependance (dependance on social reward: behevioural maintenance) are more likely to have consumed nicotine (though only statistically (it has aneffect in reality)). Weneed to find how significant our charts that prove this are.