A 4-year prospective study of the progression of XXXX in a rural Chinese population.

@entity1464 @entity2520 @entity92 @entity2521
OBJECTIVES: The natural progression of @entity2521 in the Chinese population is not well researched. We investigated the progression of @entity2520 over 4 years in 15-44-year-old Chinese villagers with no access to regular dental care. METHODS: In 1992, 486 villagers were enrolled, and in 1996, 413 villagers were re-examined. @entity92 ( @entity92 ) and clinical attachment level (CAL) were examined at six sites per tooth. Sites with   CAL >= 3mm were defined as active sites. Cross-sectional and longitudinal analyses were performed using means and percentile plots. RESULTS: The mean CAL increased by 0.26mm over 4 years. The incidence of @entity2521 (at least one site with CAL >= 3mm) was 8%. The incidence of @entity2521 among those with no @entity2520 at baseline was 44.9%. Seventy-eight percent of the subjects had at least one active site. In the 15-24-year group, 244 of 401 active sites had @entity1464 , while only 51 active sites had both @entity1464 and deeper pockets. In the 25-34-year and 35-44-year groups, almost one-third of the active sites (329/1087) and more than one-third of the active sites (580/1312) respectively had a combination of @entity1464 and deeper pockets. CONCLUSIONS: In this study, we demonstrated that in Chinese population without regular dental care, both the  initiation of @entity2521 and progression of previously existed @entity2521 contributed to  the natural progression of @entity2521 and periodontal pocketing played a greater role with age increasing. CLINICAL SIGNIFICANCE: This rare study reports the natural progression of @entity2520 in a group of Chinese villagers (15-44 years) with virtually no access to regular dental care.
