An analysis was done of morbidity involving temporary unfitness for work in those persons working on ships of the river fleet of the Kiev Water Transport Junction (KWTJ) and in the population of Ukraine. They had ulcer disease of the gastroduodenal location (UD), other gastrointestinal abnormalities in the upper portion of the tract. KWTJ workers demonstrated higher levels of UD morbidity as evidenced by the number of cases and by that of days of disability with almost equal duration of the case. After 1986 the river fleet workers appeared to be affected by UD more frequently, with its course being more grave in liquidators of the aftermath of the Chernobyl accident than in the river fleet workers who did not happen to work in Chernobyl after accident. After 1986, gastritis and duodenitis, affections of the liver, of the gallbladder and pancreas were found out to run a graver course in the KWTJ river fleet workers as compared to the able-bodied population of Ukraine.
