Ultra-processed food categorization
- Recognizable as variables nova_energyratio_adu_c_X, nova_foodintake_adu_c_X, nova_reliabilityffq_adu_c_1, nova_weightratio_adu_c_X
- UPF categorization wiki page
- Required reference: Duan, Ming-Jie, et al. "Ultra-processed food and incident type 2 diabetes: studying the underlying consumption patterns to unravel the health effects of this heterogeneous food category in the prospective Lifelines cohort." BMC medicine 20.1 (2022): 1-11.