Th their partner and if there had been an increase in the intensity of fights since the oil spill. Covariates. Age was assessed in years as a continuous variable. Household income was reported for the year immediately preceding the oil spill and was grouped into four categories: 20,000 USD/year, between 20,000 and 50,000 USD/year, between 50,000 and 80,000 USD/year, and > 80,000 USD/ year. Race w