Table 2 Prevalence of duodenal ulcer according to different types of work in day‐time workers and in shift workers.

Job	Peptic ulcer/shift workers	Peptic ulcer/day‐time workers
Industry workers	8/28 (28.6%)	2/16 (12.5%)
Drivers	3/10 (30%)	0
Healthcare workers	7/18 (38.8%)	3/35 (8.6%)
Police officers	3/13 (23.1%)	1/11 (9.1%)
Telecommunication or media workers	2/16 (12.5%)	1/26 (3.8%)
Retailers	2/5 (40%)	4/31 (12.9%)
Teachers	0	2/24 (8.3%)
Employees	0	8/86 (9.3%)
Others	4/11 (36.3%)	1/28 (3.5%)