Table 2.

Number of morbidity codes from OXMIS^* per category of gastrointestinal disease

Disease category	No of codes
Duodenal	15
Gastric	25
Ulcer unspecified	10
Oesophagitis	11
Hiatus hernia and reflux	8
Non-ulcer dyspepsia	16
Non-specific abdominal pain	4
Miscellaneous upper gastrointestinal	118

^*Oxford Medical Information System.