The investigators hypothesized that the employment-diet association would vary by countries' stage in the nutrition transition. Therefore, the investigators explored differences in the country-level associations by log-gross domestic product (GDP) per capita, adjusted for purchasing power parity, a theorized driver of the nutrition transition (41). Data were obtained from the World Development Indicators database, corresponding to the survey year (42). GDP-per capita was log-transformed to reflect the expected influence of a percent increase (e.g. 5%), rather than an absolute dollar increase (e.g. $5).