31.   Furthermore, it is not clear whether or not the control group was screened for polyps.

32.   Only three patients in the oxygen supplemented group required any form of intervention for hypoxia compared with six in the control group.

33.   Seven cases in the control group and eight cases in the oxygen treated group exceeded the tachycardia criteria.

34.   For reasons which were not readily apparent the oxygen treated group showed a significantly higher mean pulse rate value than the control group before the procedure.

35.   Periods of hypoxia were common in the control group, but greatly reduced in patients receiving oxygen.

36.   These differences were mostly caused by the increase in the weights in the treated groups compared with the control group.

37.   This control group had no abnormalities known to interfere with serum lipid concentrations, and each patients underwent the same fasting and colonic preparation as the cancer patients.

38.   Of these the blood film often revealed erythrocytes with multiple pits unlike in the control group where this was unusual.

39.   As there are no control groups described so far, the causes of the disease remain speculative.

40.   In the control group there was a significant correlation between bile acid absorption and whole gut transit.