This sounds like it contradicts itself:
Comparison of demographic data of all enrolled patients showed no significant difference between the two groups. In the enzyme group, pain scores were lower on the day of operation and for the following 5 days but did not differ significantly from the control group; however, patients of the enzyme group took significantly less analgesics and experienced significantly earlier pain relief than those of the control group, thus demonstrating a pain-reducing effect of the enzyme compound. Only few side effects were reported in both groups, none of them serious.
The first thing it says is there was no difference. Then it says pain was lower but not significantly. THEN it says it made a difference.
