Table 1. Variables within each category (the choice of variables was based on the PCA analysis, previous studies, and data availability).

Category	Name	Variables
1	Access to Medical Services	Household density, drive time to a medical facility, access to HBP medications1, physical checkup1, dental checkup1, cholesterol screening1, insurance coverage1, routine physical exams 1,2
2	Underlying Medical Conditions	Arthritis, Asthma, HBP, Cancer (except skin cancer), high cholesterol, chronic kidney disease, COPD, chronic heart disease, diabetes, poor mental condition, poor physical condition, stroke, at least one disability, median age, age above 50, age above 60, age above 70, age above 80
3	Environmental Exposures	Distance to a hazardous site, number of hazardous pollution events and LPST3, number of dry cleaners, petroleum storage tanks, and IHWCA sites4, ozone concentration, NO2 concentration, PM2.5 concentration
4	Vulnerability to Natural Disasters	FEMA Harvey claims ratio, Harvey inundation ratio
5	Sociodemographic, Behavioral, and Lifestyle Factors	Binge drinking, current smoker, no physical activity, obesity5, low sleep quality, education beyond high school diploma1, below the poverty line, living alone,

¹ The exceedance was calculated in the opposite direction.

² Routine physical exams include: Mammography (ages 50–74), Pap Smear use (ages 21–65), Fecal Occult blood test, Sigmoidoscopy, or Colonoscopy (ages 50–75), older men and women (+65) up to date on core clinical preventive services.

³ Leaky petroleum storage tank (underground tank).

⁴ Industrial and Hazardous Waste Corrective Action defined by the Texas Commission on Environmental Quality.

⁵ Obesity has emerged as a critical factor in hospitalization from COVID-19. In the context of this analysis, it was separated from other medical conditions in Category 2.