Is a high workload an unaccounted confounding factor in the relation between heavy coffee consumption and cardiovascular disease risk?

Is a high workload an unaccounted confounding factor in the relation between heavy coffee consumption and cardiovascular disease risk? Am J Clin Nutr. 2019 Nov 01;110(5):1257-1258 Authors: Atroszko PA PMID: 31667513 [PubMed - in process]
Source: The American Journal of Clinical Nutrition - Category: Nutrition Authors: Tags: Am J Clin Nutr Source Type: research