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Consult a specialist before beginning the process of smoking cessation

This attenuation supports the interpretation that residual confounding accounts for a substantial proportion of the associations observed in the conventionally adjusted models

There's no evidence suggested age (P interaction = 0.430), race (P interaction = 0.094), income (P interaction = 0.485), drinking habits (P interaction = 0.308), smoking status (P interaction = 0.177), hypertension (P interaction = 0.730), diabetes (P interaction = 0.255), and marital status (P interaction = 0.388) have no interact effect on the protective effect of dietary niacin intake on COPD