Fig 1 Study design for stomach biopsy cohort in Sweden (1979-2011). *Baseline defined as first biopsy identified in database. When multiple diagnoses were present, the most severe one was selected. †Codes for normal, minor mucosal change, gastritis, atrophic gastritis, intestinal metaplasia, and dysplasia. ‡Codes for “other diagnoses” (see supplementary table for specific codes)