based on interproximal loss of attachment and tooth mortality rates , three subpopulations were identified : ( 1 ) individuals ( approximately 8 % ) with rapid progression of periodontal disease ( rp ) , those ( approximately 81 % ) with moderate progression ( mp ) , and a group ( approximately 11 % ) who exhibited no progression ( np ) of periodontal disease beyond gingivitis .
C0017563
periodontal disease
C0017574
gingivitis