UKCCCR Register of U.K. Cancer Trials.

The UKCCCR Register of U.K. Cancer Trials comprises an on-line database of all randomized trials of cancer therapy, whether phase III or randomized phase II trials. Both current or open trials, and closed or completed trials, are included. Abstracts of any publications associated with the trials are also included. The UKCCCR Register is the initial component of a larger European register of trials. This article describes the structure and content of the database, the PC program for data entry, and the Unix-based browsing software for interactive access over networks. Problems of ensuring complete and comprehensive registration of trials, and sources of information, are also reviewed.