The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government.
Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01676545
Verified August 2012 by Shanghai Stomatological Disease Center. Recruitment status was: Active, not recruiting
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study:
35 Years and older (Adult, Senior)
Sexes Eligible for Study:
All study subjects will be selected from a pre-existing patient database in Shanghai. All chronic periodontitis cases and controls will be subjects who were at least 35 years old at time of enrollment.
Classification of chronic periodontitis will be based on the extent of periodontal tissue destruction with consideration of tooth loss.
- To be included in this study, an individual needs to be Han Chinese of 35 years of age or older at time of enrollment.
- 1) Age younger than 35 years old. 2) Patients with diagnosis of rheumatoid arthritis, psoriasis, inflammatory bowel disease, glomerulonephritis/kidney disease, cancer, or Sjogren's syndrome.