Caries prevalence and the mean values are summarized in Table
1. Caries prevalence in the primary dentition was 83%; the mean
dmft (dmfs) was 6.1 ± 4.7 (12.5 ± 12.4). The caries prevalence
associated with increase in age was significant (p < 0.01). No
significant difference was observed between genders. Caries
prevalence in the permanent dentition among Chinese adolescents
was 41%, and the means of both DMFT and DMFS were low.
When caries status was compared with SES, higher caries
prevalence was found among children with lower SES (86% vs.
81%, p < 0.05; dmft 6.7 vs. 5.7, p < 0.01) in primary dentitions. In
the permanent dentition, however, a reverse correlation was
observed (35% vs. 47%, p < 0.05). Adolescents in the high-SES
group also experienced more caries than adolescents in the low-
SES group (Independent t test, p < 0.05).
Caries prevalence and the mean values are summarized in Table1. Caries prevalence in the primary dentition was 83%; the meandmft (dmfs) was 6.1 ± 4.7 (12.5 ± 12.4). The caries prevalenceassociated with increase in age was significant (p < 0.01). Nosignificant difference was observed between genders. Cariesprevalence in the permanent dentition among Chinese adolescentswas 41%, and the means of both DMFT and DMFS were low.When caries status was compared with SES, higher cariesprevalence was found among children with lower SES (86% vs.81%, p < 0.05; dmft 6.7 vs. 5.7, p < 0.01) in primary dentitions. Inthe permanent dentition, however, a reverse correlation wasobserved (35% vs. 47%, p < 0.05). Adolescents in the high-SESgroup also experienced more caries than adolescents in the low-SES group (Independent t test, p < 0.05).
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