UBT negative patients (n=44), UBT positive with no ulcer patients (n=37) and UBT positive with ulcer or scar present patients (n=36).

• 所有试验者分成3组：尿素呼气试验阴性44人、尿素呼气试验阳性且无消化性溃疡37人、尿素呼气试验阳性且有消化性溃疡36人。