The pilot phase consisted of the completion of a health and lifestyle questionnaire and physical assessment, and most of the participants also gave biological samples. Participants provided data in person at assessment centers, via online questionnaires, or by mail. The core questionnaire collected information about health and well-being, demographics, health status, family health history, medical history, cancer diagnoses, medication use, sleep patterns, sunlight exposure, diet, alcohol consumption, tobacco use, second-hand smoke exposure, physical activity levels, employment status, and anthropometric measurements. A secondary questionnaire provided additional data about cooking and water sources, allergies, diet, depression, weight, physical activity levels, residential history, and occupational and environmental exposures. Participants also provided physical measurements, including height, weight, hip and waist circumference, body composition, and blood pressure. Biological samples, included blood, saliva, urine, and toenails, were also collected. The Atlantic PATH cohort is linkable to administrative health data, including cancer registries, physician billing, hospital discharge abstracts, vital statistics as well as hospital-based and community-based ambulatory care, including emergency rooms.

The baseline recruitment phase consisted of the completion of a health and lifestyle questionnaire and physical assessment, and most of the participants also gave biological samples. Participants provided data in person at assessment centers, via online questionnaires, or by mail. The core questionnaire collected information about health and well-being, demographics, health status, family health history, medical history, cancer diagnoses, medication use, sleep patterns, sunlight exposure, diet, alcohol consumption, tobacco use, second-hand smoke exposure, physical activity levels, employment status, and anthropometric measurements. A secondary questionnaire provided additional data about cooking and water sources, allergies, diet, depression, weight, physical activity levels, residential history, and occupational and environmental exposures. Participants also provided physical measurements including, height, weight, hip and waist circumference, body composition, and blood pressure. Biological samples included blood, saliva, urine, and toenails, were also collected. The Atlantic PATH cohort is linkable to administrative health data, including cancer registries, physician billing, hospital discharge abstracts, vital statistics as well as hospital-based and community-based ambulatory care, including emergency rooms.

Participants provided data via online questionnaires or by mail. The follow-up questionnaire collected information about demographics, mental health, health status, family health history, medical history, cancer diagnoses, medication use, behaviours (sleep patterns, alcohol consumption, tobacco use, second-hand smoke exposure, marijuana use, e-cigarette use) employment status, and anthropometric measurements. The Atlantic PATH cohort is linkable to administrative health data, including cancer registries, physician billing, hospital discharge abstracts, vital statistics as well as hospital-based and community-based ambulatory care, including emergency rooms.

Information on COVID-19 test results/suspected infection, symptoms experienced (if any), hospitalizations or received medical care, current health status and risk factors, potential source of exposure, impact of pandemic on job status and on mental, emotional, social and financial well-being were collected.